Componentize EncryptedMediaMessageFilter and rename it CdmMessageFilter.

content/browser/media/android/encrypted_media_message_filter_android.cc

Index: content/browser/media/android/encrypted_media_message_filter_android.cc
diff --git a/chrome/browser/media/encrypted_media_message_filter_android.cc b/content/browser/media/android/encrypted_media_message_filter_android.cc
similarity index 95%
rename from chrome/browser/media/encrypted_media_message_filter_android.cc
rename to content/browser/media/android/encrypted_media_message_filter_android.cc
index c935fde54c6928dbecf022e5a54b07a33795be00..b8995fcbea40cf7697855181d6d488964776ccff 100644
--- a/chrome/browser/media/encrypted_media_message_filter_android.cc
+++ b/content/browser/media/android/encrypted_media_message_filter_android.cc
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/media/encrypted_media_message_filter_android.h"
+#include "content/browser/media/android/encrypted_media_message_filter_android.h"
 
 #include <string>
 
-#include "chrome/common/encrypted_media_messages_android.h"
+#include "content/common/media/encrypted_media_messages_android.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/base/android/media_codec_bridge.h"
 #include "media/base/android/media_drm_bridge.h"
@@ -15,7 +15,7 @@ using content::BrowserThread;
 using media::MediaCodecBridge;
 using media::MediaDrmBridge;
 
-namespace chrome {
+namespace content {
 
 const size_t kMaxKeySystemLength = 256;
 
@@ -112,4 +112,4 @@ void EncryptedMediaMessageFilterAndroid::OnGetSupportedKeySystems(
   response->non_compositing_codecs = GetSupportedCodecs(request, false);
 }
 
-}  // namespace chrome
+}  // namespace content