Adds the ability for WebContentsDelegate to decide if event should be updated

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 1ef3212d4b63270d2bb636624643593f48d7dc24..46d7a6aaddd2e260802afc35767d7b891699dad4 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -40,6 +40,7 @@ class RenderWidgetHostInputEventRouter;
 class RenderViewHostDelegateView;
 class TextInputManager;
 class WebContents;
+enum class KeyboardEventProcessingResult;
 struct ScreenInfo;
 struct NativeWebKeyboardEvent;
 
@@ -77,12 +78,10 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   virtual void GetScreenInfo(ScreenInfo* web_screen_info);
 
   // Callback to give the browser a chance to handle the specified keyboard
-  // event before sending it to the renderer.
-  // Returns true if the |event| was handled. Otherwise, if the |event| would
-  // be handled in HandleKeyboardEvent() method as a normal keyboard shortcut,
-  // |*is_keyboard_shortcut| should be set to true.
-  virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
-                                      bool* is_keyboard_shortcut);
+  // event before sending it to the renderer. See enum for details on return
+  // value.
+  virtual KeyboardEventProcessingResult PreHandleKeyboardEvent(
+      const NativeWebKeyboardEvent& event);
 
   // Callback to inform the browser that the renderer did not process the
   // specified events. This gives an opportunity to the browser to process the