Removing ChildProcessHostMsg_SyncAllocateSharedMemory IPC message.

content/common/child_process_host_impl.h

Index: content/common/child_process_host_impl.h
diff --git a/content/common/child_process_host_impl.h b/content/common/child_process_host_impl.h
index a45eb6f2d5670c91b79aff9c68969a7322c72c9d..1576489acb97972402a98d40d9a47bd3b302f2bf 100644
--- a/content/common/child_process_host_impl.h
+++ b/content/common/child_process_host_impl.h
@@ -41,11 +41,6 @@ class CONTENT_EXPORT ChildProcessHostImpl : public ChildProcessHost,
  public:
   ~ChildProcessHostImpl() override;
 
-  // Public and static for reuse by RenderMessageFilter.
-  static void AllocateSharedMemory(
-      size_t buffer_size,
-      base::SharedMemoryHandle* handle);
-
   // Returns a unique ID to identify a child process. On construction, this
   // function will be used to generate the id_, but it is also used to generate
   // IDs for the RenderProcessHost, which doesn't inherit from us, and whose IDs
@@ -93,8 +88,6 @@ class CONTENT_EXPORT ChildProcessHostImpl : public ChildProcessHost,
 
   // Message handlers:
   void OnShutdownRequest();
-  void OnAllocateSharedMemory(uint32_t buffer_size,
-                              base::SharedMemoryHandle* handle);
   void OnAllocateGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                                  uint32_t width,
                                  uint32_t height,