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 3b828dae4cc3e726bb594889884cb98e863dc827..08b1c7283d41353a66fb1e2da12e4ae9b885567f 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -83,6 +83,7 @@ class RenderViewImpl;
 class RenderWidget;
 class RenderWidgetFullscreenPepper;
 class ScreenOrientationDispatcher;
+class SpeechRecognitionDispatcher;
 class UserMediaClientImpl;
 struct CommitNavigationParams;
 struct CommonNavigationParams;
@@ -471,6 +472,7 @@ 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;
@@ -794,6 +796,10 @@ 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_;