Adds chromium side plumbing to pass speech input calls back and forth with WebKit.

Please advise if any of the code needs to be within "#if ENABLE_INPUT_SPEECH", since most of the speech input code in webkit is under "#if ENABLE(INPUT_SPEECH)"

- Created renderer/SpeechInputDispatcher, implements WebKit::WebSpeechInputController which is used by WebView for invoking speech input.
- Created browser/speech/SpeechInputDispatcherHost to receive IPC messages from the above SpeechInputDispatcher. Nothing done yet apart from receiving the messages.
- Creates new directory chrome/browser/speech, this will be used for SpeechInputDispatcherHost, network based speech recognizer, speech audio recording/buffering code as well as  speech output (Text-to-speech) code in future.

BUG=none
TEST=no functionality to test yet.

Review URL: http://codereview.chromium.org/3035035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@54981 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 0 deletions

diff --git a/chrome/renderer/render_view.cc b/chrome/renderer/render_view.cc
index 39c4193..9d97ee2 100644
--- a/chrome/renderer/render_view.cc
+++ b/chrome/renderer/render_view.cc
@@ -61,6 +61,7 @@
 #include "chrome/renderer/render_view_visitor.h"
 #include "chrome/renderer/renderer_webapplicationcachehost_impl.h"
 #include "chrome/renderer/renderer_webstoragenamespace_impl.h"
+#include "chrome/renderer/speech_input_dispatcher.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
 #include "chrome/renderer/user_script_slave.h"
 #include "chrome/renderer/visitedlink_slave.h"
@@ -628,6 +629,10 @@ void RenderView::OnMessageReceived(const IPC::Message& message) {
       geolocation_dispatcher_->OnMessageReceived(message)) {
     return;
   }
+  if (speech_input_dispatcher_.get() &&
+      speech_input_dispatcher_->OnMessageReceived(message)) {
+    return;
+  }
 
   IPC_BEGIN_MESSAGE_MAP(RenderView, message)
     IPC_MESSAGE_HANDLER(ViewMsg_CaptureThumbnail, OnCaptureThumbnail)
@@ -5258,6 +5263,13 @@ WebKit::WebGeolocationService* RenderView::geolocationService() {
   return geolocation_dispatcher_.get();
 }
 
+WebKit::WebSpeechInputController* RenderView::speechInputController(
+    WebKit::WebSpeechInputListener* listener) {
+  if (!speech_input_dispatcher_.get())
+    speech_input_dispatcher_.reset(new SpeechInputDispatcher(this, listener));
+  return speech_input_dispatcher_.get();
+}
+
 bool RenderView::IsNonLocalTopLevelNavigation(
     const GURL& url, WebKit::WebFrame* frame, WebKit::WebNavigationType type) {
   // Must be a top level frame.