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

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index 55f903745f28f3210fa2bb760958993f69aedc72..69280ff2e339636cb08e73c3d3d0c9dd5678893e 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -976,6 +976,19 @@ IPC_BEGIN_MESSAGES(View)
   IPC_MESSAGE_ROUTED1(ViewMsg_AccessibilityDoDefaultAction,
                       int /* object id */)
 
+  // Relay a speech recognition result, either partial or final.
+  IPC_MESSAGE_ROUTED1(ViewMsg_SpeechInput_SetRecognitionResult,
+                      string16 /* result */)
+
+  // Indicate that speech recognizer has stopped recording and started
+  // recognition.
+  IPC_MESSAGE_ROUTED0(ViewMsg_SpeechInput_RecordingComplete)
+
+  // Indicate that speech recognizer has completed recognition. This will be
+  // the last message sent in response to a
+  // ViewHostMsg_SpeechInput_StartRecognition.
+  IPC_MESSAGE_ROUTED0(ViewMsg_SpeechInput_RecognitionComplete)
+
 IPC_END_MESSAGES(View)
 
 
@@ -2535,4 +2548,22 @@ IPC_BEGIN_MESSAGES(ViewHost)
   // This allows the browser to handle things such as zooming differently.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_SetDisplayingPDFContent)
 
+  // Requests the speech input service to start speech recognition on behalf of
+  // the given |render_view_id|.
+  IPC_MESSAGE_CONTROL1(ViewHostMsg_SpeechInput_StartRecognition,
+                       int /* render_view_id */)
+
+  // Requests the speech input service to cancel speech recognition on behalf of
+  // the given |render_view_id|. If speech recognition is not happening nor or
+  // is happening on behalf of some other render view, this call does nothing.
+  IPC_MESSAGE_CONTROL1(ViewHostMsg_SpeechInput_CancelRecognition,
+                       int /* render_view_id */)
+
+  // Requests the speech input service to stop audio recording on behalf of
+  // the given |render_view_id|. Any audio recorded so far will be fed to the
+  // speech recognizer. If speech recognition is not happening nor or is
+  // happening on behalf of some other render view, this call does nothing.
+  IPC_MESSAGE_CONTROL1(ViewHostMsg_SpeechInput_StopRecording,
+                       int /* render_view_id */)
+
 IPC_END_MESSAGES(ViewHost)