Make SpeechRecognition per RenderFrame instead of per RenderView.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 77d4941458969da14df8f10cb08ec9743ff6bc57..f225b10d8df4be72405d1158e275d5b4b0ba1335 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -84,6 +84,7 @@ class RenderViewImpl;
 class RenderWidget;
 class RenderWidgetFullscreenPepper;
 class ScreenOrientationDispatcher;
+class SpeechRecognitionDispatcher;
 class UserMediaClientImpl;
 struct CommitNavigationParams;
 struct CommonNavigationParams;
@@ -480,6 +481,7 @@ class CONTENT_EXPORT RenderFrameImpl
         const blink::WebAXObject& end_object,
         int end_offset);
   virtual void didChangeManifest(blink::WebLocalFrame*);
+  virtual blink::WebSpeechRecognizer* speechRecognizer();
 
   // WebMediaPlayerDelegate implementation:
   void DidPlay(blink::WebMediaPlayer* player) override;
@@ -799,6 +801,10 @@ class CONTENT_EXPORT RenderFrameImpl
   // process.
   ManifestManager* manifest_manager_;
 
+  // The speech recognition dispatcher attached to this frame, lazily
+  // initialized.
+  SpeechRecognitionDispatcher* speech_recognition_dispatcher_;
+
   // The current accessibility mode.
   AccessibilityMode accessibility_mode_;