Fix memory leak in IPC::ChannelProxy

ipc/ipc_channel_proxy.cc

Index: ipc/ipc_channel_proxy.cc
===================================================================
--- ipc/ipc_channel_proxy.cc	(revision 21433)
+++ ipc/ipc_channel_proxy.cc	(working copy)
@@ -10,8 +10,30 @@
 
 namespace IPC {
 
-//-----------------------------------------------------------------------------
+//------------------------------------------------------------------------------
 
+// This task ensures the message is deleted if the task is deleted without
+// having been run.
+class SendTask : public Task {
+ public:
+  SendTask(ChannelProxy::Context* context, Message* message)
+      : context_(context),
+        message_(message) {
+  }
+
+  virtual void Run() {
+    context_->OnSendMessage(message_.release());
+  }
+
+ private:
+  scoped_refptr<ChannelProxy::Context> context_;
+  scoped_ptr<Message> message_;
+
+  DISALLOW_COPY_AND_ASSIGN(SendTask);
+};
+
+//------------------------------------------------------------------------------
+
 ChannelProxy::Context::Context(Channel::Listener* listener,
                                MessageFilter* filter,
                                MessageLoop* ipc_message_loop)
@@ -254,8 +276,8 @@
   Logging::current()->OnSendMessage(message, context_->channel_id());
 #endif
 
-  context_->ipc_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
-      context_.get(), &Context::OnSendMessage, message));
+  context_->ipc_message_loop()->PostTask(FROM_HERE,
+                                         new SendTask(context_.get(), message));
   return true;
 }