Add canUpdateLayout & canHandleGestureEvent to WebViewClient.

content/renderer/render_view_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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 247 matching lines @@
 
   // blink::WebWidgetClient implementation ------------------------------------
 
   // Most methods are handled by RenderWidget.
   void show(blink::WebNavigationPolicy policy) override;
   void didHandleGestureEvent(const blink::WebGestureEvent& event,
                              bool event_cancelled) override;
   void onMouseDown(const blink::WebNode& mouse_down_node) override;
   blink::WebLayerTreeView* initializeLayerTreeView() override;
 
+  bool canHandleGestureEvent() override;
+  bool canUpdateLayout() override;
+
   // TODO(lfg): Remove once WebViewClient no longer inherits from
   // WebWidgetClient.
   void closeWidgetSoon() override;
   void convertViewportToWindow(blink::WebRect* rect) override;
   void convertWindowToViewport(blink::WebFloatRect* rect) override;
   void didOverscroll(const blink::WebFloatSize& overscrollDelta,
                      const blink::WebFloatSize& accumulatedOverscroll,
                      const blink::WebFloatPoint& positionInViewport,
                      const blink::WebFloatSize& velocityInViewport) override;
   void hasTouchEventHandlers(bool has_handlers) override;
@@ skipping 558 matching lines @@
   // ---------------------------------------------------------------------------
 
   base::WeakPtrFactory<RenderViewImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_