[Extensions] Remove ExtensionFunction usage of RenderViewHost

extensions/browser/extension_function.h

Index: extensions/browser/extension_function.h
diff --git a/extensions/browser/extension_function.h b/extensions/browser/extension_function.h
index 9627b08b71f9bfbea363138856ee14ef86520261..e1494c79600bee98ca90e7ca51a1b2e3d3dcf58d 100644
--- a/extensions/browser/extension_function.h
+++ b/extensions/browser/extension_function.h
@@ -39,7 +39,6 @@ class Value;
 namespace content {
 class BrowserContext;
 class RenderFrameHost;
-class RenderViewHost;
 class WebContents;
 }
 
@@ -510,11 +509,6 @@ class UIThreadExtensionFunction : public ExtensionFunction {
   }
   content::BrowserContext* browser_context() const { return context_; }
 
-  // DEPRECATED: Please use render_frame_host().
-  // TODO(devlin): Remove this once all callers are updated to use
-  // render_frame_host().
-  content::RenderViewHost* render_view_host_do_not_use() const;
-
   void SetRenderFrameHost(content::RenderFrameHost* render_frame_host);
   content::RenderFrameHost* render_frame_host() const {
     return render_frame_host_;