Use persistent memory for receiving metrics from sub-processes.

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 24 matching lines @@
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gl/gpu_switching_observer.h"
 
 #if defined(OS_ANDROID)
 #include "content/public/browser/android/interface_registry_android.h"
 #endif
 
 namespace base {
 class CommandLine;
 class MessageLoop;
+class SharedPersistentMemoryAllocator;
 }
 
 namespace gfx {
 class Size;
 }
 
 namespace IPC {
 class ChannelMojoHost;
 }
 
@@ skipping 512 matching lines @@
       instance_weak_factory_;
 
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_