Add the UI compositor to the Mac build

content/browser/compositor/image_transport_factory.h

Index: content/browser/compositor/image_transport_factory.h
diff --git a/content/browser/aura/image_transport_factory.h b/content/browser/compositor/image_transport_factory.h
similarity index 94%
rename from content/browser/aura/image_transport_factory.h
rename to content/browser/compositor/image_transport_factory.h
index b2c807fdb9cbe8c0ed1eb0a4292bf022fcfca164..6f2b06ae30b99ee98e82ff067cc8872d0063e7ec 100644
--- a/content/browser/aura/image_transport_factory.h
+++ b/content/browser/compositor/image_transport_factory.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_
-#define CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_
+#ifndef CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
+#define CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
 
 #include <string>
 
@@ -91,4 +91,4 @@ class CONTENT_EXPORT ImageTransportFactory {
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_AURA_IMAGE_TRANSPORT_FACTORY_H_
+#endif  // CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_