Put the Pepper stuff in the content namespace.

content/renderer/render_widget_fullscreen_pepper.h

Index: content/renderer/render_widget_fullscreen_pepper.h
diff --git a/content/renderer/render_widget_fullscreen_pepper.h b/content/renderer/render_widget_fullscreen_pepper.h
index 1597f8f4bf0d8a0c7f8a4f80ff30e3e945cd978f..31389dd12daf0cd5ce03f8505b49a1cd439ae5dd 100644
--- a/content/renderer/render_widget_fullscreen_pepper.h
+++ b/content/renderer/render_widget_fullscreen_pepper.h
@@ -23,9 +23,10 @@ class PluginInstance;
 // A RenderWidget that hosts a fullscreen pepper plugin. This provides a
 // FullscreenContainer that the plugin instance can callback into to e.g.
 // invalidate rects.
-class RenderWidgetFullscreenPepper : public RenderWidgetFullscreen,
-                                     public webkit::ppapi::FullscreenContainer,
-                                     public PepperParentContextProvider {
+class RenderWidgetFullscreenPepper
+    : public RenderWidgetFullscreen,
+      public webkit::ppapi::FullscreenContainer,
+      public content::PepperParentContextProvider {
  public:
   static RenderWidgetFullscreenPepper* Create(
       int32 opener_id,