Factor DRP PreviewsState logic out of content

content/renderer/render_frame_impl.h

 // Copyright 2013 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_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 444 matching lines @@
   void AttachGuest(int element_instance_id) override;
   void DetachGuest(int element_instance_id) override;
   void SetSelectedText(const base::string16& selection_text,
                        size_t offset,
                        const gfx::Range& range) override;
   void EnsureMojoBuiltinsAreAvailable(v8::Isolate* isolate,
                                       v8::Local<v8::Context> context) override;
   void AddMessageToConsole(ConsoleMessageLevel level,
                            const std::string& message) override;
   void DetachDevToolsForTest() override;
+  void SetPreviewsState(PreviewsState previews_state) override;
   PreviewsState GetPreviewsState() const override;
   bool IsPasting() const override;
   blink::WebPageVisibilityState GetVisibilityState() const override;
   bool IsBrowserSideNavigationPending() override;
   base::SingleThreadTaskRunner* GetTimerTaskRunner() override;
   base::SingleThreadTaskRunner* GetLoadingTaskRunner() override;
   base::SingleThreadTaskRunner* GetUnthrottledTaskRunner() override;
   int GetEnabledBindings() const override;
 
   // blink::mojom::EngagementClient implementation:
@@ skipping 1009 matching lines @@
   RenderThreadImpl::RendererMemoryMetrics peak_memory_metrics_;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_