[DevTools] Handle emulation in embedder, call into web API.

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 <deque>
 #include <map>
 #include <set>
@@ skipping 491 matching lines @@
   bool CanComposeInline() override;
   void DidCommitCompositorFrame() override;
   void DidCompletePageScaleAnimation() override;
 
  protected:
   explicit RenderViewImpl(const ViewMsg_New_Params& params);
 
   void Initialize(const ViewMsg_New_Params& params,
                   CompositorDependencies* compositor_deps,
                   bool was_created_by_renderer);
-  void SetScreenMetricsEmulationParameters(float device_scale_factor,
-                                           const gfx::Point& root_layer_offset,
-                                           float root_layer_scale) override;
+  void SetScreenMetricsEmulationParameters(
+      bool enabled,
+      const blink::WebDeviceEmulationParams& params) override;
 
   // Do not delete directly.  This class is reference counted.
   virtual ~RenderViewImpl();
 
  private:
   // For unit tests.
   friend class PepperDeviceTest;
   friend class RenderViewImplTest;
   friend class RenderViewTest;
   friend class RendererAccessibilityTest;
@@ skipping 524 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_