Instant: Use only one hidden WebContents per profile.

chrome/renderer/searchbox/searchbox_extension.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_SEARCHBOX_SEARCHBOX_EXTENSION_H_
 #define CHROME_RENDERER_SEARCHBOX_SEARCHBOX_EXTENSION_H_
 
 #include "base/basictypes.h"
 
+namespace content {
+class RenderView;
+}
+
 namespace v8 {
 class Extension;
 }
 
-namespace WebKit {
-class WebFrame;
-}
-
 namespace extensions_v8 {
 
 // Reference implementation of the SearchBox API as described in:
 // http://dev.chromium.org/searchbox
 class SearchBoxExtension {
  public:
-  // Returns the v8::Extension object handling searchbox bindings. Returns null
-  // if match-preview is not enabled. Caller takes ownership of returned object.
+  // Returns the v8::Extension object handling searchbox bindings. Caller takes

[samarth, 2013/03/11 19:03:24]

Can you use scoped_ptr instead?

+  // ownership of the returned object.
   static v8::Extension* Get();
 
-  static void DispatchChange(WebKit::WebFrame* frame);
-  static void DispatchSubmit(WebKit::WebFrame* frame);
-  static void DispatchCancel(WebKit::WebFrame* frame);
-  static void DispatchResize(WebKit::WebFrame* frame);
-
-  static bool PageSupportsInstant(WebKit::WebFrame* frame);
-
-  // Extended API.
-  static void DispatchOnWindowReady(WebKit::WebFrame* frame);
-  static void DispatchAutocompleteResults(WebKit::WebFrame* frame);
-  static void DispatchUpOrDownKeyPress(WebKit::WebFrame* frame, int count);
-  static void DispatchEscKeyPress(WebKit::WebFrame* frame);
-  static void DispatchKeyCaptureChange(WebKit::WebFrame* frame);
-  static void DispatchMarginChange(WebKit::WebFrame* frame);
-  static void DispatchThemeChange(WebKit::WebFrame* frame);
-
-  // New Tab Page API.
-  static void DispatchMostVisitedChanged(WebKit::WebFrame* frame);
+  static bool DetermineInstantSupport(content::RenderView* render_view);

[samarth, 2013/03/12 21:31:21]

Per offline discussion, we should consider just moving these into a namespace
instead of this class.

+  static void Change(content::RenderView* render_view);
+  static void Submit(content::RenderView* render_view);
+  static void Blur(content::RenderView* render_view);
+  static void PopupBounds(content::RenderView* render_view);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SearchBoxExtension);
 };
 
 }  // namespace extensions_v8
 
 #endif  // CHROME_RENDERER_SEARCHBOX_SEARCHBOX_EXTENSION_H_