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

content/common/accessibility_messages.h

Index: content/common/accessibility_messages.h
diff --git a/content/common/accessibility_messages.h b/content/common/accessibility_messages.h
index 8c3c636750b2032a376d88fbc108404e85e9880c..fa24e8e5b92f599b435da96d06b6bf3df3b35a2d 100644
--- a/content/common/accessibility_messages.h
+++ b/content/common/accessibility_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_ACCESSIBILITY_MESSAGES_H_
+#define CONTENT_COMMON_ACCESSIBILITY_MESSAGES_H_
+
 // IPC messages for accessibility.
 // Multiply-included message file, hence no include guard.
 
@@ -219,3 +222,5 @@ IPC_MESSAGE_ROUTED3(AccessibilityHostMsg_ChildFrameHitTestResult,
 IPC_MESSAGE_ROUTED2(AccessibilityHostMsg_SnapshotResponse,
                     int /* callback_id */,
                     content::AXContentTreeUpdate)
+
+#endif  // CONTENT_COMMON_ACCESSIBILITY_MESSAGES_H_