Snapshot of all changes to get jumbo in blink and content.

content/common/media/audio_messages.h

Index: content/common/media/audio_messages.h
diff --git a/content/common/media/audio_messages.h b/content/common/media/audio_messages.h
index f9186608d511cbfc50eeb96fe34fcfa1cdc242c4..87c5b9a3f880b349363da39fb2f49fcb19b28f92 100644
--- a/content/common/media/audio_messages.h
+++ b/content/common/media/audio_messages.h
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifndef CONTENT_COMMON_MEDIA_AUDIO_MESSAGES_H_
+#define CONTENT_COMMON_MEDIA_AUDIO_MESSAGES_H_
+
 // IPC messages for the audio.
 // Multiply-included message file, hence no include guard.
 
@@ -135,3 +138,5 @@ IPC_MESSAGE_CONTROL2(AudioHostMsg_SetVolume,
 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume,
                      int /* stream_id */,
                      double /* volume */)
+
+#endif  // CONTENT_COMMON_MEDIA_AUDIO_MESSAGES_H_