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

content/browser/renderer_host/render_widget_host_view_gtk.cc

Index: content/browser/renderer_host/render_widget_host_view_gtk.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_gtk.cc b/content/browser/renderer_host/render_widget_host_view_gtk.cc
index edf0a208e785e51411bebf19a08b049b6a52ad71..bc2d7aafb3175418bcc716f8504eea4e661273c8 100644
--- a/content/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/content/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -103,6 +103,7 @@ bool MovedToCenter(const WebKit::WebMouseEvent& mouse_event,
 
 }  // namespace
 
+using content::RenderWidgetHostImpl;
 using content::RenderWidgetHostView;
 using content::RenderWidgetHostViewPort;
 using WebKit::WebInputEventFactory;
@@ -572,7 +573,8 @@ class RenderWidgetHostViewGtkWidget {
   DISALLOW_IMPLICIT_CONSTRUCTORS(RenderWidgetHostViewGtkWidget);
 };
 
-RenderWidgetHostViewGtk::RenderWidgetHostViewGtk(RenderWidgetHost* widget_host)
+RenderWidgetHostViewGtk::RenderWidgetHostViewGtk(
+    content::RenderWidgetHost* widget_host)
     : host_(RenderWidgetHostImpl::From(widget_host)),
       about_to_validate_and_paint_(false),
       is_hidden_(false),
@@ -672,7 +674,8 @@ void RenderWidgetHostViewGtk::InitAsFullscreen(
   DoPopupOrFullscreenInit(window, bounds);
 }
 
-RenderWidgetHost* RenderWidgetHostViewGtk::GetRenderWidgetHost() const {
+content::RenderWidgetHost*
+RenderWidgetHostViewGtk::GetRenderWidgetHost() const {
   return host_;
 }
 
@@ -1417,7 +1420,7 @@ void RenderWidgetHostViewGtk::ModifyEventMovementAndCoords(
 
 // static
 RenderWidgetHostView* RenderWidgetHostView::CreateViewForWidget(
-    RenderWidgetHost* widget) {
+    content::RenderWidgetHost* widget) {
   return new RenderWidgetHostViewGtk(widget);
 }