Move c/r/extensions/* into extensions namespace

chrome/renderer/chrome_render_view_observer.h

Index: chrome/renderer/chrome_render_view_observer.h
diff --git a/chrome/renderer/chrome_render_view_observer.h b/chrome/renderer/chrome_render_view_observer.h
index 7d86ea6bcba0146206f997a73362cac8658c7267..483d22394945181633074d8cad14397285c92ba2 100644
--- a/chrome/renderer/chrome_render_view_observer.h
+++ b/chrome/renderer/chrome_render_view_observer.h
@@ -19,13 +19,16 @@
 
 class ChromeRenderProcessObserver;
 class ContentSettingsObserver;
-class ExtensionDispatcher;
 class ExternalHostBindings;
 class SkBitmap;
 class TranslateHelper;
 struct ThumbnailScore;
 class WebViewColorOverlay;
 
+namespace extensions {
+class Dispatcher;
+}
+
 namespace WebKit {
 class WebView;
 }
@@ -48,7 +51,7 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
       content::RenderView* render_view,
       ContentSettingsObserver* content_settings,
       ChromeRenderProcessObserver* chrome_render_process_observer,
-      ExtensionDispatcher* extension_dispatcher,
+      extensions::Dispatcher* extension_dispatcher,
       TranslateHelper* translate_helper);
   virtual ~ChromeRenderViewObserver();
 
@@ -197,7 +200,7 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
 
   // Owned by ChromeContentRendererClient and outlive us.
   ChromeRenderProcessObserver* chrome_render_process_observer_;
-  ExtensionDispatcher* extension_dispatcher_;
+  extensions::Dispatcher* extension_dispatcher_;
 
   // Have the same lifetime as us.
   ContentSettingsObserver* content_settings_;