Implement web speech synthesis.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index a9c255b818839023ea63c7eefa127525cf2e8cb5..76f76c47242648077bae85d192171b65b64d141e 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -66,6 +66,7 @@
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/search_engines/search_provider_install_state_message_filter.h"
 #include "chrome/browser/speech/chrome_speech_recognition_manager_delegate.h"
+#include "chrome/browser/speech/tts_message_filter.h"
 #include "chrome/browser/spellchecker/spellcheck_message_filter.h"
 #include "chrome/browser/ssl/ssl_add_certificate.h"
 #include "chrome/browser/ssl/ssl_blocking_page.h"
@@ -727,6 +728,9 @@ void ChromeContentBrowserClient::RenderProcessHostCreated(
   host->GetChannel()->AddFilter(
       new prerender::PrerenderMessageFilter(id, profile));
   host->GetChannel()->AddFilter(new ValidationMessageMessageFilter(id));
+#if !defined(OS_ANDROID)
+  host->GetChannel()->AddFilter(new TtsMessageFilter(id, profile));
+#endif
 
   host->Send(new ChromeViewMsg_SetIsIncognitoProcess(
       profile->IsOffTheRecord()));
@@ -1784,6 +1788,7 @@ void ChromeContentBrowserClient::ResourceDispatcherHostCreated() {
   return g_browser_process->ResourceDispatcherHostCreated();
 }
 
+// TODO(tommi): Rename from Get to Create.
 content::SpeechRecognitionManagerDelegate*
     ChromeContentBrowserClient::GetSpeechRecognitionManagerDelegate() {
 #if defined(ENABLE_INPUT_SPEECH)