Convert tabs, windows, and extension APIs to feature system.

chrome/renderer/extensions/chrome_v8_extension.h

Index: chrome/renderer/extensions/chrome_v8_extension.h
diff --git a/chrome/renderer/extensions/chrome_v8_extension.h b/chrome/renderer/extensions/chrome_v8_extension.h
index 84fda03ddcbd84a78d5d2fd913834e83a226aa33..898dd249340ba6975cd2bc5059e9aef1bfd41780 100644
--- a/chrome/renderer/extensions/chrome_v8_extension.h
+++ b/chrome/renderer/extensions/chrome_v8_extension.h
@@ -49,11 +49,6 @@ class ChromeV8Extension : public NativeHandler {
   // Gets the render view for the current v8 context.
   static content::RenderView* GetCurrentRenderView();
 
-  // Note: do not call this function before or during the chromeHidden.onLoad
-  // event dispatch. The URL might not have been committed yet and might not
-  // be an extension URL.
-  const ::Extension* GetExtensionForCurrentRenderView() const;
-
   // Returns the chromeHidden object for the current context.
   static v8::Handle<v8::Value> GetChromeHidden(const v8::Arguments& args);