Integrate gumbo_parser with gtest.

This adds the support to build with gtest submodule through gyp+ninja.

To generate the new ninja files, run:
$ gyp --depth=. gumbo_parser.gyp

To build use the following command line:
$ ninja -C out/Default gumbo_parser_unittests

To run use this command line:
$ out/Default/gump_parser_unittests

Signed-off-by: Thiago Farina <tfarina@chromium.org>

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "testdata"]
 	path = testdata
 	url = https://github.com/html5lib/html5lib-tests.git
+[submodule "third_party/gtest"]
+	path = third_party/gtest
+	url = https://chromium.googlesource.com/external/googletest/

gtest.gyp

@@ -0,0 +1,133 @@
+# Copyright 2013 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+{
+  'targets': [
+    {
+      'target_name': 'gtest',
+      'type': 'static_library',
+      'include_dirs': [
+        'third_party/gtest',
+        'third_party/gtest/include',
+      ],
+      'link_settings': {
+        'ldflags': ['-lpthread'],
+      },
+      'dependencies': [
+        'gtest_prod',
+      ],
+      'sources': [
+        'third_party/gtest/include/gtest/gtest-death-test.h',
+        'third_party/gtest/include/gtest/gtest-message.h',
+        'third_party/gtest/include/gtest/gtest-param-test.h',
+        'third_party/gtest/include/gtest/gtest-printers.h',
+        'third_party/gtest/include/gtest/gtest-spi.h',
+        'third_party/gtest/include/gtest/gtest-test-part.h',
+        'third_party/gtest/include/gtest/gtest-typed-test.h',
+        'third_party/gtest/include/gtest/gtest.h',
+        'third_party/gtest/include/gtest/gtest_pred_impl.h',
+        'third_party/gtest/include/gtest/internal/gtest-death-test-internal.h',
+        'third_party/gtest/include/gtest/internal/gtest-filepath.h',
+        'third_party/gtest/include/gtest/internal/gtest-internal.h',
+        'third_party/gtest/include/gtest/internal/gtest-linked_ptr.h',
+        'third_party/gtest/include/gtest/internal/gtest-param-util-generated.h',
+        'third_party/gtest/include/gtest/internal/gtest-param-util.h',
+        'third_party/gtest/include/gtest/internal/gtest-port.h',
+        'third_party/gtest/include/gtest/internal/gtest-string.h',
+        'third_party/gtest/include/gtest/internal/gtest-tuple.h',
+        'third_party/gtest/include/gtest/internal/gtest-type-util.h',
+        'third_party/gtest/src/gtest-all.cc',
+        'third_party/gtest/src/gtest-death-test.cc',
+        'third_party/gtest/src/gtest-filepath.cc',
+        'third_party/gtest/src/gtest-internal-inl.h',
+        'third_party/gtest/src/gtest-port.cc',
+        'third_party/gtest/src/gtest-printers.cc',
+        'third_party/gtest/src/gtest-test-part.cc',
+        'third_party/gtest/src/gtest-typed-test.cc',
+        'third_party/gtest/src/gtest.cc',
+      ],
+      'sources!': [
+        'third_party/gtest/src/gtest-all.cc',  # Not needed by our build.
+      ],
+      'conditions': [
+        ['OS == "mac" or OS == "ios"', {
+          'sources': [
+            'gtest_mac.h',
+            'gtest_mac.mm',
+            'platform_test_mac.mm'
+          ],
+          'link_settings': {
+            'libraries': [
+              '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
+            ],
+          },
+        }],
+        ['OS=="win" and (MSVS_VERSION=="2012" or MSVS_VERSION=="2012e")', {
+          'defines': [
+            '_VARIADIC_MAX=10',
+          ],
+          'direct_dependent_settings': {
+            'defines': [
+              '_VARIADIC_MAX=10',
+            ],
+          },
+        }],
+      ],
+      'direct_dependent_settings': {
+        'defines': [
+          'UNIT_TEST',
+        ],
+        'include_dirs': [
+          'third_party/gtest/include',  # So that gtest headers can find themselves.
+        ],
+        'target_conditions': [
+          ['_type=="executable"', {
+            'test': 1,
+            'conditions': [
+              ['OS=="mac"', {
+                'run_as': {
+                  'action????': ['${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}'],
+                },
+              }],
+              ['OS=="win"', {
+                'run_as': {
+                  'action????': ['$(TargetPath)', '--gtest_print_time'],
+                },
+              }],
+            ],
+          }],
+        ],
+        'msvs_disabled_warnings': [4800],
+      },
+    },
+    {
+      'target_name': 'gtest_main',
+      'type': 'static_library',
+      'dependencies': [
+        'gtest',
+      ],
+      'sources': [
+        'third_party/gtest/src/gtest_main.cc',
+      ],
+    },
+    {
+      'target_name': 'gtest_prod',
+      'toolsets': ['host', 'target'],
+      'type': 'none',
+      'sources': [
+        'third_party/gtest/include/gtest/gtest_prod.h',
+      ],
+    },
+  ],
+}

gumbo_parser.gyp

@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-#
 
 {
   'targets': [
@@ -46,5 +45,31 @@
         'src/vector.h',
       ],
     },
+    {
+      'target_name': 'gumbo_parser_unittests',
+      'type': 'executable',
+      'dependencies': [
+        'gtest.gyp:gtest',
+        'gtest.gyp:gtest_main',
+        'gumbo_parser',
+      ],
+      'include_dirs': [
+        '.',
+        '..',
+        'src',
+      ],
+      'sources': [
+        'tests/attribute.cc',
+        'tests/char_ref.cc',
+        'tests/parser.cc',
+        'tests/string_buffer.cc',
+        'tests/string_piece.cc',
+        'tests/test_utils.cc',
+        'tests/test_utils.h',
+        'tests/tokenizer.cc',
+        'tests/utf8.cc',
+        'tests/vector.cc',
+      ],
+    },
   ],
 }

tests/attribute.cc

@@ -19,9 +19,9 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "gtest/gtest.h"
-#include "vector.h"
 #include "test_utils.h"
+#include "third_party/gtest/include/gtest/gtest.h"
+#include "vector.h"
 
 namespace {
 

tests/char_ref.cc

@@ -26,8 +26,8 @@
 #include <string.h>
 
 #include "test_utils.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 #include "utf8.h"
-#include "gtest/gtest.h"
 
 namespace {
 

tests/parser.cc

@@ -19,7 +19,7 @@
 #include <string>
 
 #include "test_utils.h"
-#include "gtest/gtest.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 
 namespace {
 

tests/string_buffer.cc

@@ -19,8 +19,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "gtest/gtest.h"
 #include "test_utils.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 #include "util.h"
 
 namespace {

tests/string_piece.cc

@@ -19,9 +19,9 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "gtest/gtest.h"
 #include "parser.h"
 #include "test_utils.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 #include "util.h"
 
 namespace {

tests/test_utils.h

@@ -23,7 +23,7 @@
 
 #include "gumbo.h"
 #include "parser.h"
-#include "gtest/gtest.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 
 inline std::string ToString(const GumboStringPiece& str) {
   return std::string(str.data, str.length);

tests/tokenizer.cc

@@ -19,8 +19,7 @@
 #include <stdio.h>
 
 #include "test_utils.h"
-
-#include "gtest/gtest.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 
 extern const char* kGumboTagNames[];
 

tests/utf8.cc

@@ -22,7 +22,7 @@
 #include "gumbo.h"
 #include "parser.h"
 #include "test_utils.h"
-#include "gtest/gtest.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 
 namespace {
 

tests/vector.cc

@@ -19,8 +19,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "gtest/gtest.h"
 #include "test_utils.h"
+#include "third_party/gtest/include/gtest/gtest.h"
 
 namespace {