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

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index ab1ed3226c564f6f525aab8f23cf76b4d9d727a2..32623f9aad6b2e742f4299d35386a193e0e26079 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -633,8 +633,8 @@ class CONTENT_EXPORT WebContentsImpl
   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;