Make shared memory allocation possible for all child process types.

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
===================================================================
--- content/browser/renderer_host/render_message_filter.h	(revision 104763)
+++ content/browser/renderer_host/render_message_filter.h	(working copy)
@@ -189,8 +189,8 @@
   // Used to ask the browser to allocate a block of shared memory for the
   // renderer to send back data in, since shared memory can't be created
   // in the renderer on POSIX due to the sandbox.
-  void OnAllocateSharedMemoryBuffer(uint32 buffer_size,
-                                    base::SharedMemoryHandle* handle);
+  void OnAllocateSharedMemory(size_t buffer_size,
+                              base::SharedMemoryHandle* handle);
   void OnResolveProxy(const GURL& url, IPC::Message* reply_msg);
 
   // Browser side transport DIB allocation