Mojo C++ bindings: support mapping mojo string to WTF::String.

mojo/mojom_bindings_generator.gypi

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'includes': [
     'mojom_bindings_generator_variables.gypi',
   ],
   'variables': {
     'variables': {
       'mojom_typemap_dependencies%': [],
       'mojom_typemaps%': [],
       'mojom_variant%': 'none',
+      'for_blink%': 'false',
     },
     'mojom_typemap_dependencies%': ['<@(mojom_typemap_dependencies)'],
     'mojom_typemaps%': ['<@(mojom_typemaps)'],
     'mojom_variant%': '<(mojom_variant)',
+    'for_blink%': '<(for_blink)',
     'mojom_base_output_dir':
         '<!(python <(DEPTH)/build/inverse_depth.py <(DEPTH))',
     'mojom_generated_outputs': [
       '<!@(python <(DEPTH)/mojo/public/tools/bindings/mojom_list_outputs.py --basedir <(mojom_base_output_dir) --variant <(mojom_variant) <@(_sources))',
     ],
     'mojom_generator_typemap_args': [
       '<!@(python <(DEPTH)/mojo/public/tools/bindings/mojom_get_generator_typemap_args.py <@(mojom_typemaps))',
     ],
     'mojom_extra_generator_args%': [],
     'conditions': [
       ['mojom_variant=="none"', {
         'mojom_output_languages%': 'c++,javascript,java',
       }, {
         'mojom_output_languages%': 'c++',
       }],
+      ['for_blink=="true"', {
+        'mojom_generator_wtf_arg%': [
+          '--for_blink',
+        ],
+        'wtf_dependencies%': [
+          'mojo_public.gyp:mojo_cpp_bindings_wtf_support',
+          '../third_party/WebKit/Source/wtf/wtf.gyp:wtf',
+        ],
+      }, {
+        'mojom_generator_wtf_arg%': [],
+        'wtf_dependencies%': [],
+      }],
     ],
   },
   'actions': [
     {
       'variables': {
         'java_out_dir': '<(PRODUCT_DIR)/java_mojo/<(_target_name)/src',
         'stamp_filename': '<(PRODUCT_DIR)/java_mojo/<(_target_name)/<(_target_name).stamp',
       },
       'action_name': '<(_target_name)_mojom_bindings_stamp',
       # The java output directory is deleted to ensure that the java library
@@ skipping 48 matching lines @@
         '--use_bundled_pylibs', 'generate',
         './<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).mojom',
         '-d', '<(DEPTH)',
         '<@(mojom_import_args)',
         '-o', '<(SHARED_INTERMEDIATE_DIR)',
         '--java_output_directory=<(java_out_dir)',
         '--variant', '<(mojom_variant)',
         '-g', '<(mojom_output_languages)',
         '<@(mojom_generator_typemap_args)',
         '<@(mojom_extra_generator_args)',
+        '<@(mojom_generator_wtf_arg)',
         '--bytecode_path',
         '<(SHARED_INTERMEDIATE_DIR)/mojo/public/tools/bindings',
       ],
       'message': 'Generating Mojo bindings from <(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).mojom',
       'process_outputs_as_sources': 1,
     }
   ],
   'dependencies': [
     '<(DEPTH)/base/base.gyp:base',
     '<(DEPTH)/mojo/mojo_public.gyp:mojo_interface_bindings_generation',
     '<(DEPTH)/mojo/public/tools/bindings/bindings.gyp:precompile_mojom_bindings_generator_templates',
     '<@(mojom_typemap_dependencies)',
+    '<@(wtf_dependencies)',
   ],
   'export_dependent_settings': [
     '<@(mojom_typemap_dependencies)',
+    '<@(wtf_dependencies)',
   ],
   'include_dirs': [
     '<(DEPTH)',
     '<(SHARED_INTERMEDIATE_DIR)',
   ],
   'direct_dependent_settings': {
     'include_dirs': [
       '<(DEPTH)',
       '<(SHARED_INTERMEDIATE_DIR)',
     ],
     'variables': {
       'generated_src_dirs': [
         '<(PRODUCT_DIR)/java_mojo/<(_target_name)/src',
       ],
       'additional_input_paths': [
         '<@(mojom_bindings_generator_sources)',
         '<@(_sources)',
       ],
     },
   },
   'hard_dependency': 1,
 }