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

content/browser/renderer_host/render_widget_host_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 22 matching lines @@
 }
 
 namespace content {
 
 class BrowserAccessibilityManager;
 class RenderWidgetHostImpl;
 class RenderWidgetHostInputEventRouter;
 class RenderViewHostDelegateView;
 class TextInputManager;
 class WebContents;
+enum class KeyboardEventProcessingResult;
 struct ScreenInfo;
 struct NativeWebKeyboardEvent;
 
 //
 // RenderWidgetHostDelegate
 //
 //  An interface implemented by an object interested in knowing about the state
 //  of the RenderWidgetHost.
 class CONTENT_EXPORT RenderWidgetHostDelegate {
  public:
@@ skipping 17 matching lines @@
   // The screen info has changed.
   virtual void ScreenInfoChanged() {}
 
   // Sets the device scale factor for frames associated with this WebContents.
   virtual void UpdateDeviceScaleFactor(double device_scale_factor) {}
 
   // Retrieve screen information.
   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
   // event (used for keyboard shortcuts).
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {}
 
   // Callback to inform the browser that the renderer did not process the
   // specified mouse wheel event.  Returns true if the browser has handled
   // the event itself.
   virtual bool HandleWheelEvent(const blink::WebMouseWheelEvent& event);
@@ skipping 150 matching lines @@
   // not a WebContents, returns nullptr.
   virtual WebContents* GetAsWebContents();
 
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_