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

content/browser/web_contents/web_contents_impl.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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 615 matching lines @@
   void RenderWidgetCreated(RenderWidgetHostImpl* render_widget_host) override;
   void RenderWidgetDeleted(RenderWidgetHostImpl* render_widget_host) override;
   void RenderWidgetGotFocus(RenderWidgetHostImpl* render_widget_host) override;
   void RenderWidgetWasResized(RenderWidgetHostImpl* render_widget_host,
                               bool width_changed) override;
   void ResizeDueToAutoResize(RenderWidgetHostImpl* render_widget_host,
                              const gfx::Size& new_size) override;
   void ScreenInfoChanged() override;
   void UpdateDeviceScaleFactor(double device_scale_factor) override;
   void GetScreenInfo(ScreenInfo* screen_info) override;
-  bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
-                              bool* is_keyboard_shortcut) override;
+  KeyboardEventProcessingResult PreHandleKeyboardEvent(
+      const NativeWebKeyboardEvent& event) override;
   void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) override;
   bool HandleWheelEvent(const blink::WebMouseWheelEvent& event) override;
   bool PreHandleGestureEvent(const blink::WebGestureEvent& event) override;
   BrowserAccessibilityManager* GetRootBrowserAccessibilityManager() override;
   BrowserAccessibilityManager* GetOrCreateRootBrowserAccessibilityManager()
       override;
   // The following 4 functions are already listed under WebContents overrides:
   // void Cut() override;
   // void Copy() override;
   // void Paste() override;
@@ skipping 905 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_