Broker out PPAPI handle duplication

ppapi/proxy/proxy_channel.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 PPAPI_PROXY_PROXY_CHANNEL_H_
 #define PPAPI_PROXY_PROXY_CHANNEL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_platform_file.h"
@@ skipping 19 matching lines @@
   class PPAPI_PROXY_EXPORT Delegate {
    public:
     virtual ~Delegate() {}
 
     // Returns the dedicated message loop for processing IPC requests.
     virtual base::MessageLoopProxy* GetIPCMessageLoop() = 0;
 
     // Returns the event object that becomes signalled when the main thread's
     // message loop exits.
     virtual base::WaitableEvent* GetShutdownEvent() = 0;
+
+    // Duplicates a handle to the provided object, returning one that is valid
+    // on the other side of the channel. This is part of the delegate interface
+    // because both sides of the channel may not have sufficient permission to
+    // duplicate handles directly. The implementation must provide the same
+    // guarantees as ProxyChannel::ShareHandleWithRemote below.
+    virtual IPC::PlatformFileForTransit ShareHandleWithRemote(
+        base::PlatformFile handle,
+        const IPC::SyncChannel& channel,
+        bool should_close_source) = 0;
   };
 
   virtual ~ProxyChannel();
 
   // Alternative to InitWithChannel() for unit tests that want to send all
   // messages sent via this channel to the given test sink. The test sink
   // must outlive this class.
   void InitWithTestSink(IPC::TestSink* test_sink);
 
   // Shares a file handle (HANDLE / file descriptor) with the remote side. It
@@ skipping 15 matching lines @@
   // Will be NULL in some unit tests and if the remote side has crashed.
   IPC::SyncChannel* channel() const {
     return channel_.get();
   }
 
 #if defined(OS_POSIX)
   int TakeRendererFD();
 #endif
 
  protected:
-  explicit ProxyChannel(base::ProcessHandle remote_process_handle);
+  explicit ProxyChannel();
 
   // You must call this function before anything else. Returns true on success.
   // The delegate pointer must outlive this class, ownership is not
   // transferred.
   virtual bool InitWithChannel(Delegate* delegate,
                                const IPC::ChannelHandle& channel_handle,
                                bool is_client);
 
   ProxyChannel::Delegate* delegate() const {
     return delegate_;
   }
 
  private:
   // Non-owning pointer. Guaranteed non-NULL after init is called.
   ProxyChannel::Delegate* delegate_;
 
-  base::ProcessHandle remote_process_handle_;  // See getter above.
-
   // When we're unit testing, this will indicate the sink for the messages to
   // be deposited so they can be inspected by the test. When non-NULL, this
   // indicates that the channel should not be used.
   IPC::TestSink* test_sink_;
 
   // Will be null for some tests when there is a test_sink_, and if the
   // remote side has crashed.
   scoped_ptr<IPC::SyncChannel> channel_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyChannel);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PROXY_CHANNEL_H_