Move Render(View|Widget)Host and associated classes to content namespace.

content/public/browser/render_widget_host.h

Index: content/public/browser/render_widget_host.h
diff --git a/content/public/browser/render_widget_host.h b/content/public/browser/render_widget_host.h
index 39c0535a5a3fef4b5995431e784c535107a5da21..03242c3fa98c492294700da145438c0af65fb7aa 100644
--- a/content/public/browser/render_widget_host.h
+++ b/content/public/browser/render_widget_host.h
@@ -20,13 +20,6 @@
 #include "skia/ext/platform_device.h"
 #endif
 
-class RenderWidgetHostImpl;
-
-namespace content {
-class RenderProcessHost;
-class RenderWidgetHostView;
-}
-
 namespace gfx {
 class Rect;
 }
@@ -35,6 +28,12 @@ namespace skia {
 class PlatformCanvas;
 }
 
+namespace content {
+
+class RenderProcessHost;
+class RenderWidgetHostImpl;
+class RenderWidgetHostView;
+
 // A RenderWidgetHost manages the browser side of a browser<->renderer
 // HWND connection.  The HWND lives in the browser process, and
 // windows events are sent over IPC to the corresponding object in the
@@ -287,4 +286,6 @@ class CONTENT_EXPORT RenderWidgetHost : public IPC::Channel::Sender {
   virtual RenderWidgetHostImpl* AsRenderWidgetHostImpl() = 0;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_