Move responsiblity of tab suspending from renderer to TabManager

content/browser/renderer_host/render_process_host_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_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 330 matching lines @@
   // available for extraction by a SubprocesMetricsProvider in order to
   // report those histograms to UMA.
   void CreateSharedRendererHistogramAllocator();
 
   // Handle termination of our process.
   void ProcessDied(bool already_dead, RendererClosedDetails* known_details);
 
   // GpuSwitchingObserver implementation.
   void OnGpuSwitched() override;
 
+  void Suspend() override;
+
 #if defined(ENABLE_WEBRTC)
   void OnRegisterAecDumpConsumer(int id);
   void OnRegisterEventLogConsumer(int id);
   void OnUnregisterAecDumpConsumer(int id);
   void OnUnregisterEventLogConsumer(int id);
   void RegisterAecDumpConsumerOnUIThread(int id);
   void RegisterEventLogConsumerOnUIThread(int id);
   void UnregisterAecDumpConsumerOnUIThread(int id);
   void UnregisterEventLogConsumerOnUIThread(int id);
   void EnableAecDumpForId(const base::FilePath& file, int id);
@@ skipping 175 matching lines @@
   mojo::ScopedMessagePipeHandle in_process_renderer_handle_;
 
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_