Shows chrome-extension urls and greys out the whole url.

chrome/browser/ui/toolbar/toolbar_model.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_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_H_
 #define CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 52 matching lines @@
   virtual int GetIcon() const = 0;
 
   // Returns the name of the EV cert holder.  Only call this when the security
   // level is EV_SECURE.
   virtual string16 GetEVCertName() const = 0;
 
   // Returns whether the URL for the current navigation entry should be
   // in the location bar.
   virtual bool ShouldDisplayURL() const = 0;
 
+  // Queries the delegate WebContent's WebUI and returns true when the URL
+  // for the current navigation entry should be entirely greyed out in the
+  // location bar.

[Peter Kasting, 2013/04/03 22:32:13]

Nit: The comment shouldn't be talking about implementation detail so much.  Just
say:

// Returns whether the URL for the current navigation entry should be displayed
in all grey, as opposed to with the host in black (the default behavior).

[Patrick Riordan, 2013/04/04 01:01:37]

Done.

+  virtual bool ShouldGreyOutURL() const = 0;
+
   // Getter/setter of whether the text in location bar is currently being
   // edited.
   virtual void SetInputInProgress(bool value) = 0;
   virtual bool GetInputInProgress() const = 0;
 
  protected:
    ToolbarModel() {}
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MODEL_H_