Move SharedBitmapManager implementation out of content/

ipc/ipc_channel_proxy.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 IPC_IPC_CHANNEL_PROXY_H_
 #define IPC_IPC_CHANNEL_PROXY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 207 matching lines @@
     auto request = mojo::MakeRequest(&ptr_info);
     GetGenericRemoteAssociatedInterface(Interface::Name_, request.PassHandle());
     *out_ptr = mojo::ThreadSafeAssociatedInterfacePtr<Interface>::Create(
         std::move(ptr_info), ipc_task_runner());
   }
 
   base::SingleThreadTaskRunner* ipc_task_runner() const {
     return context_->ipc_task_runner();
   }
 
+  const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner_refptr()
+      const {
+    return context_->ipc_task_runner_refptr();
+  }
+
   // Called to clear the pointer to the IPC task runner when it's going away.
   void ClearIPCTaskRunner();
 
  protected:
   class Context;
   // A subclass uses this constructor if it needs to add more information
   // to the internal state.
   explicit ChannelProxy(Context* context);
 
   // Used internally to hold state that is referenced on the IPC thread.
   class Context : public base::RefCountedThreadSafe<Context>,
                   public Listener {
    public:
     Context(Listener* listener,
             const scoped_refptr<base::SingleThreadTaskRunner>& ipc_thread);
     void ClearIPCTaskRunner();
     base::SingleThreadTaskRunner* ipc_task_runner() const {
       return ipc_task_runner_.get();
     }
+    const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner_refptr()
+        const {
+      return ipc_task_runner_;
+    }
+
     // Dispatches a message on the listener thread.
     void OnDispatchMessage(const Message& message);
 
     // Sends |message| from appropriate thread.
     void Send(Message* message);
 
    protected:
     friend class base::RefCountedThreadSafe<Context>;
     ~Context() override;
 
@@ skipping 137 matching lines @@
   bool did_init_;
 
 #if defined(ENABLE_IPC_FUZZER)
   OutgoingMessageFilter* outgoing_message_filter_;
 #endif
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H_