Move the rest of the renderer->browser messages that belong in content. Also do a bunch of cleanup:

content/common/child_process_messages.h

 // Copyright (c) 2011 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.
 
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 
@@ skipping 25 matching lines @@
 
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ShutdownRequest)
 
 // Reply from child processes acking ChildProcessMsg_TraceChangeStatus(false).
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_EndTracingAck)
 
 // Child processes send trace data back in JSON chunks.
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TraceDataCollected,
                      std::string /*json trace data*/)
 
+// NaCl's 64 bit Windows build only links with a bare-minimum number of
+// libraries, and GURL isn't one of them.
+#if !defined(NACL_WIN64)
 // Get the list of proxies to use for |url|, as a semicolon delimited list
 // of "<TYPE> <HOST>:<PORT>" | "DIRECT".
 IPC_SYNC_MESSAGE_CONTROL1_2(ChildProcessHostMsg_ResolveProxy,
                             GURL /* url */,
                             int /* network error */,
                             std::string /* proxy list */)
+#endif