Revert of Replacing allocate bitmap IPC messages with a new Mojo interface.

content/common/child_process_messages.h

 // Copyright (c) 2012 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 <stdint.h>
 
 #include <string>
@@ skipping 161 matching lines @@
 #if defined(OS_WIN)
 // Request that the given font be loaded by the host so it's cached by the
 // OS. Please see ChildProcessHost::PreCacheFont for details.
 IPC_SYNC_MESSAGE_CONTROL1_0(ChildProcessHostMsg_PreCacheFont,
                             LOGFONT /* font data */)
 
 // Release the cached font
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ReleaseCachedFonts)
 #endif  // defined(OS_WIN)
 
+// Asks the browser to create a block of shared memory for the child process to
+// fill in and pass back to the browser.
+IPC_SYNC_MESSAGE_CONTROL2_1(ChildProcessHostMsg_SyncAllocateSharedBitmap,
+                            uint32_t /* buffer size */,
+                            cc::SharedBitmapId,
+                            base::SharedMemoryHandle)
+
+// Informs the browser that the child allocated a shared bitmap.
+IPC_MESSAGE_CONTROL3(ChildProcessHostMsg_AllocatedSharedBitmap,
+                     uint32_t /* buffer size */,
+                     base::SharedMemoryHandle,
+                     cc::SharedBitmapId)
+
+// Informs the browser that the child deleted a shared bitmap.
+IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_DeletedSharedBitmap,
+                     cc::SharedBitmapId)
+
 // Asks the browser to create a gpu memory buffer.
 IPC_SYNC_MESSAGE_CONTROL5_1(ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer,
                             gfx::GpuMemoryBufferId /* new_id */,
                             uint32_t /* width */,
                             uint32_t /* height */,
                             gfx::BufferFormat,
                             gfx::BufferUsage,
                             gfx::GpuMemoryBufferHandle)
 
 // Informs the browser that the child deleted a gpu memory buffer.
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_DeletedGpuMemoryBuffer,
                      gfx::GpuMemoryBufferId,
                      gpu::SyncToken /* sync_token */)
 
 #if defined(OS_LINUX)
 // Asks the browser to change the priority of thread.
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_SetThreadPriority,
                      base::PlatformThreadId,
                      base::ThreadPriority)
 #endif