Make SpeechRecognition per RenderFrame instead of per RenderView.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 8e1c65719186c10b67c940f7db1b2df4e72556b3..4287429ff87b43dc0a4b52f49c9c3955bcfb4478 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -27,6 +27,7 @@
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/common/accessibility_mode_enums.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/color_chooser.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -63,6 +64,7 @@ class RenderViewHostImpl;
 class RenderWidgetHostImpl;
 class SavePackage;
 class ScreenOrientationDispatcherHost;
+class SpeechRecognitionDispatcherHost;
 class SiteInstance;
 class TestWebContents;
 class WebContentsAudioMuter;
@@ -1217,6 +1219,9 @@ class CONTENT_EXPORT WebContentsImpl
 
   scoped_ptr<ManifestManagerHost> manifest_manager_host_;
 
+  scoped_ptr<SpeechRecognitionDispatcherHost, BrowserThread::DeleteOnIOThread>
+      speech_recognition_dispatcher_host_;
+
   // The accessibility mode for all frames. This is queried when each frame
   // is created, and broadcast to all frames when it changes.
   AccessibilityMode accessibility_mode_;