Add method for identifying different InfoBars

components/infobars/core/infobar_delegate.h

 // Copyright 2014 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 COMPONENTS_INFOBARS_CORE_INFOBAR_DELEGATE_H_
 #define COMPONENTS_INFOBARS_CORE_INFOBAR_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/strings/string16.h"
 #include "ui/base/window_open_disposition.h"
@@ skipping 65 matching lines @@
   static const int kNoIconID;
 
   // Called when the InfoBar that owns this delegate is being destroyed.  At
   // this point nothing is visible onscreen.
   virtual ~InfoBarDelegate();
 
   // Returns the type of the infobar.  The type determines the appearance (such
   // as background color) of the infobar.
   virtual Type GetInfoBarType() const;
 
+  // Returns a unique string identifying the infobar.
+  // Implementers must update the InfoBarType enum in histograms.xml with the
+  // string provided by this function as the key and
+  // base::HashMetricName(string) as its value.
+  virtual std::string GetIdentifier() const = 0;
+
   virtual InfoBarAutomationType GetInfoBarAutomationType() const;
 
   // Returns the resource ID of the icon to be shown for this InfoBar.  If the
   // value is equal to |kNoIconID|, GetIcon() will not show an icon by default.
   virtual int GetIconId() const;
 
   // Returns the vector icon identifier to be shown for this InfoBar. This will
   // take precedence over GetIconId() (although typically only one of the two
   // should be defined for any given infobar).
   virtual gfx::VectorIconId GetVectorIconId() const;
@@ skipping 57 matching lines @@
 
   // The ID of the active navigation entry at the time we became owned.
   int nav_entry_id_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarDelegate);
 };
 
 }  // namespace infobars
 
 #endif  // COMPONENTS_INFOBARS_CORE_INFOBAR_DELEGATE_H_