Componentize EncryptedMediaMessageFilter and rename it CdmMessageFilter.

chrome/common/encrypted_media_messages_android.h

Index: chrome/common/encrypted_media_messages_android.h
diff --git a/chrome/common/encrypted_media_messages_android.h b/chrome/common/encrypted_media_messages_android.h
deleted file mode 100644
index 034fb3bbc14fd4caee998a346f51b8ed22f4f291..0000000000000000000000000000000000000000
--- a/chrome/common/encrypted_media_messages_android.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2013 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.
-
-// IPC messages for EME on android.
-// Multiply-included message file, hence no include guard.
-
-#include <vector>
-
-#include "content/public/common/eme_codec.h"
-#include "ipc/ipc_message_macros.h"
-
-#define IPC_MESSAGE_START EncryptedMediaMsgStart
-
-IPC_STRUCT_BEGIN(SupportedKeySystemRequest)
-  IPC_STRUCT_MEMBER(std::string, key_system)
-  IPC_STRUCT_MEMBER(content::SupportedCodecs, codecs, content::EME_CODEC_NONE)
-IPC_STRUCT_END()
-
-IPC_STRUCT_BEGIN(SupportedKeySystemResponse)
-  IPC_STRUCT_MEMBER(std::string, key_system)
-  IPC_STRUCT_MEMBER(content::SupportedCodecs,
-                    compositing_codecs,
-                    content::EME_CODEC_NONE)
-  IPC_STRUCT_MEMBER(content::SupportedCodecs,
-                    non_compositing_codecs,
-                    content::EME_CODEC_NONE)
-IPC_STRUCT_END()
-
-// Messages sent from the renderer to the browser.
-
-// Synchronously get a list of supported EME key systems.
-IPC_SYNC_MESSAGE_CONTROL1_1(
-    ChromeViewHostMsg_GetSupportedKeySystems,
-    SupportedKeySystemRequest /* key system information request */,
-    SupportedKeySystemResponse /* key system information response */)