Removing the ChildProcessHostMsg_SyncAllocateSharedMemory IPC message.

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 78db5e2017cdbf8747b73a848798e8fdcbcf9c7c..ca45695628440e106c60e128fab4b823730398f2 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -183,11 +183,9 @@ bool RenderMessageFilter::OnMessageReceived(const IPC::Message& message) {
         ViewHostMsg_SetNeedsBeginFrames,
         ResizeHelperPostMsgToUIThread(render_process_id_, message))
 #endif
-    // NB: The SyncAllocateSharedMemory, SyncAllocateGpuMemoryBuffer, and
-    // DeletedGpuMemoryBuffer IPCs are handled here for renderer processes. For
-    // non-renderer child processes, they are handled in ChildProcessHostImpl.
-    IPC_MESSAGE_HANDLER_DELAY_REPLY(
-        ChildProcessHostMsg_SyncAllocateSharedMemory, OnAllocateSharedMemory)
+    // NB: The SyncAllocateGpuMemoryBuffer and DeletedGpuMemoryBuffer IPCs are
+    // handled here for renderer processes. For non-renderer child processes,
+    // they are handled in ChildProcessHostImpl.
     IPC_MESSAGE_HANDLER_DELAY_REPLY(
         ChildProcessHostMsg_SyncAllocateSharedBitmap, OnAllocateSharedBitmap)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(
@@ -336,25 +334,6 @@ void RenderMessageFilter::SendLoadFontReply(IPC::Message* reply,
 
 #endif  // defined(OS_MACOSX)
 
-void RenderMessageFilter::AllocateSharedMemoryOnFileThread(
-    uint32_t buffer_size,
-    IPC::Message* reply_msg) {
-  base::SharedMemoryHandle handle;
-  ChildProcessHostImpl::AllocateSharedMemory(buffer_size, PeerHandle(),
-                                             &handle);
-  ChildProcessHostMsg_SyncAllocateSharedMemory::WriteReplyParams(reply_msg,
-                                                                 handle);
-  Send(reply_msg);
-}
-
-void RenderMessageFilter::OnAllocateSharedMemory(uint32_t buffer_size,
-                                                 IPC::Message* reply_msg) {
-  BrowserThread::PostTask(
-      BrowserThread::FILE_USER_BLOCKING, FROM_HERE,
-      base::Bind(&RenderMessageFilter::AllocateSharedMemoryOnFileThread, this,
-                 buffer_size, reply_msg));
-}
-
 void RenderMessageFilter::AllocateSharedBitmapOnFileThread(
     uint32_t buffer_size,
     const cc::SharedBitmapId& id,