Implement web speech synthesis.

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index fa10df6407c652b0b04392097698a1161857ddc9..f76a736075a122c1afec17ddfbc32a39a891ab3e 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -855,6 +855,18 @@ WebKit::WebHyphenator* RendererWebKitPlatformSupportImpl::hyphenator() {
 
 //------------------------------------------------------------------------------
 
+WebKit::WebSpeechSynthesizer*
+RendererWebKitPlatformSupportImpl::createSpeechSynthesizer(
+    WebKit::WebSpeechSynthesizerClient* client) {
+  WebKit::WebSpeechSynthesizer* synthesizer =
+      GetContentClient()->renderer()->OverrideSpeechSynthesizer(client);
+  if (synthesizer)
+    return synthesizer;
+  return NULL;

[jam, 2013/04/30 17:11:20]

nit:

return GetContentClient()->renderer()->OverrideSpeechSynthesizer(client);

[dmazzoni, 2013/05/02 22:13:25]

Done.

+}
+
+//------------------------------------------------------------------------------
+
 bool RendererWebKitPlatformSupportImpl::processMemorySizesInBytes(
     size_t* private_bytes, size_t* shared_bytes) {
   content::RenderThread::Get()->Send(