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

chrome/browser/extensions/api/tab_capture/offscreen_tab.h

 // Copyright 2015 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 CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 113 matching lines @@
 
   // content::WebContentsDelegate overrides to provide the desired behaviors.
   void CloseContents(content::WebContents* source) final;
   bool ShouldSuppressDialogs(content::WebContents* source) final;
   bool ShouldFocusLocationBarByDefault(content::WebContents* source) final;
   bool ShouldFocusPageAfterCrash() final;
   void CanDownload(const GURL& url,
                    const std::string& request_method,
                    const base::Callback<void(bool)>& callback) final;
   bool HandleContextMenu(const content::ContextMenuParams& params) final;
-  bool PreHandleKeyboardEvent(content::WebContents* source,
-                              const content::NativeWebKeyboardEvent& event,
-                              bool* is_keyboard_shortcut) final;
+  content::KeyboardEventProcessingResult PreHandleKeyboardEvent(
+      content::WebContents* source,
+      const content::NativeWebKeyboardEvent& event) final;
   bool PreHandleGestureEvent(content::WebContents* source,
                              const blink::WebGestureEvent& event) final;
   bool CanDragEnter(content::WebContents* source,
                     const content::DropData& data,
                     blink::WebDragOperationsMask operations_allowed) final;
   bool ShouldCreateWebContents(
       content::WebContents* web_contents,
       content::SiteInstance* source_site_instance,
       int32_t route_id,
       int32_t main_frame_route_id,
@@ skipping 64 matching lines @@
   // This is false until after the Start() method is called, and capture of the
   // |offscreen_tab_web_contents_| is first detected.
   bool content_capture_was_detected_;
 
   DISALLOW_COPY_AND_ASSIGN(OffscreenTab);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TAB_CAPTURE_OFFSCREEN_TAB_H_