Move discardable memory to //components from //content

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>
 #include <vector>
 
 #include "base/memory/shared_memory.h"
 #include "base/tracked_objects.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "cc/resources/shared_bitmap_manager.h"
+#include "components/discardable_memory/common/discardable_shared_memory_id.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits_macros.h"
-#include "content/common/host_discardable_shared_memory_manager.h"
 #include "gpu/command_buffer/common/sync_token.h"
 #include "gpu/ipc/common/gpu_param_traits_macros.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "ui/gfx/ipc/skia/gfx_skia_param_traits.h"
 
 #if defined(OS_LINUX)
@@ skipping 178 matching lines @@
 // Informs the browser that the child deleted a gpu memory buffer.
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_DeletedGpuMemoryBuffer,
                      gfx::GpuMemoryBufferId,
                      gpu::SyncToken /* sync_token */)
 
 // Asks the browser to create a block of discardable shared memory for the
 // child process.
 IPC_SYNC_MESSAGE_CONTROL2_1(
     ChildProcessHostMsg_SyncAllocateLockedDiscardableSharedMemory,
     uint32_t /* size */,
-    content::DiscardableSharedMemoryId,
+    discardable_memory::DiscardableSharedMemoryId,
     base::SharedMemoryHandle)
 
 // Informs the browser that the child deleted a block of discardable shared
 // memory.
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_DeletedDiscardableSharedMemory,
-                     content::DiscardableSharedMemoryId)
+                     discardable_memory::DiscardableSharedMemoryId)
 
 #if defined(OS_LINUX)
 // Asks the browser to change the priority of thread.
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_SetThreadPriority,
                      base::PlatformThreadId,
                      base::ThreadPriority)
 #endif