[Mac]: Enable speech sub-menu under the edit menu and pipe it through to the renderer.

content/port/browser/render_widget_host_view_port.h

Index: content/port/browser/render_widget_host_view_port.h
===================================================================
--- content/port/browser/render_widget_host_view_port.h	(revision 148651)
+++ content/port/browser/render_widget_host_view_port.h	(working copy)
@@ -5,6 +5,8 @@
 #ifndef CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 #define CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 
+#include <vector>
+
 #include "base/callback.h"
 #include "base/process_util.h"
 #include "base/string16.h"
@@ -213,6 +215,9 @@
       int32 width,
       int32 height,
       TransportDIB::Handle transport_dib) = 0;
+
+  // Tells the view to speak the given |text|.
+  virtual void SpeakText(const string16& text) = 0;
 #endif
 
   virtual void AcceleratedSurfaceNew(