Add a WebUIControllerFactory in content and move chrome://webrtc-internals to content.

content/browser/media/webrtc_internals_ui_observer.h

Index: content/browser/media/webrtc_internals_ui_observer.h
===================================================================
--- content/browser/media/webrtc_internals_ui_observer.h	(revision 179210)
+++ content/browser/media/webrtc_internals_ui_observer.h	(working copy)
@@ -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 CHROME_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_
-#define CHROME_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_
+#ifndef CONTENT_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_
+#define CONTENT_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_
 
 #include <string>
 
@@ -11,6 +11,8 @@
 class Value;
 }  // namespace base
 
+namespace content {
+
 // Implement this interface to receive WebRTCInternals updates.
 class WebRTCInternalsUIObserver {
  public:
@@ -21,4 +23,6 @@
                         const base::Value* args) = 0;
 };
 
-#endif  // CHROME_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_WEBRTC_INTERNALS_UI_OBSERVER_H_