Implement web speech synthesis.

content/renderer/renderer_webkitplatformsupport_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 837 matching lines @@
 WebKit::WebHyphenator* RendererWebKitPlatformSupportImpl::hyphenator() {
   WebKit::WebHyphenator* hyphenator =
       GetContentClient()->renderer()->OverrideWebHyphenator();
   if (hyphenator)
     return hyphenator;
   return hyphenator_.get();
 }
 
 //------------------------------------------------------------------------------
 
+WebKit::WebSpeechSynthesizer*
+RendererWebKitPlatformSupportImpl::createSpeechSynthesizer(
+    WebKit::WebSpeechSynthesizerClient* client) {
+  return GetContentClient()->renderer()->OverrideSpeechSynthesizer(client);
+}
+
+//------------------------------------------------------------------------------
+
 bool RendererWebKitPlatformSupportImpl::processMemorySizesInBytes(
     size_t* private_bytes, size_t* shared_bytes) {
   content::RenderThread::Get()->Send(
       new ViewHostMsg_GetProcessMemorySizes(private_bytes, shared_bytes));
   return true;
 }
 
 //------------------------------------------------------------------------------
 
 WebKit::WebGraphicsContext3D*
@@ skipping 22 matching lines @@
 //------------------------------------------------------------------------------
 
 GrContext* RendererWebKitPlatformSupportImpl::sharedOffscreenGrContext() {
   if (!shared_offscreen_context_)
     return NULL;
   return shared_offscreen_context_->GrContext();
 }
 
 
 }  // namespace content