Move RenderWidgetHostView into content namespace. Fix include paths.

content/public/browser/render_widget_host_view.h

Index: content/public/browser/render_widget_host_view.h
diff --git a/content/public/browser/render_widget_host_view.h b/content/public/browser/render_widget_host_view.h
index d674011b23bf1338bea396242cff5f38e940d1f6..99d152cb15f3f3ffc8c6c3c4e37d766cf1ddc376 100644
--- a/content/public/browser/render_widget_host_view.h
+++ b/content/public/browser/render_widget_host_view.h
@@ -23,6 +23,8 @@ class Rect;
 class Size;
 }
 
+namespace content {
+
 // RenderWidgetHostView is an interface implemented by an object that acts as
 // the "View" portion of a RenderWidgetHost. The RenderWidgetHost and its
 // associated RenderProcessHost own the "Model" in this case which is the
@@ -30,8 +32,6 @@ class Size;
 // the surrounding environment and passing them to the RenderWidgetHost, and
 // for actually displaying the content of the RenderWidgetHost when it
 // changes.
-//
-// TODO(joi): Move to content namespace.
 class CONTENT_EXPORT RenderWidgetHostView {
  public:
   virtual ~RenderWidgetHostView() {}
@@ -138,6 +138,8 @@ class CONTENT_EXPORT RenderWidgetHostView {
       GetBrowserAccessibilityManager() const = 0;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_