When we open a popup window from an app window, we used to identify this popu...

chrome/browser/browser.h

 // Copyright (c) 2006-2008 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_BROWSER_H_
 #define CHROME_BROWSER_BROWSER_H_
 
 #include "base/basictypes.h"
 
 #include <set>
@@ skipping 35 matching lines @@
 class Browser : public TabStripModelDelegate,
                 public TabStripModelObserver,
                 public TabContentsDelegate,
                 public CommandUpdater::CommandUpdaterDelegate,
                 public NotificationObserver,
                 public SelectFileDialog::Listener {
  public:
   enum Type {
     TYPE_NORMAL = 0,
     TYPE_POPUP = 1,
-    TYPE_APP = 2
+    TYPE_APP = 2,
+    TYPE_APP_POPUP = TYPE_APP | TYPE_POPUP,
   };
 
   // Constructors, Creation, Showing //////////////////////////////////////////
 
   // Creates a new browser of the given |type| and for the given |profile|. The
   // Browser has a NULL window after its construction, CreateBrowserWindow must
   // be called after configuration for window() to be valid.
   Browser(Type type, Profile* profile);
   ~Browser();
 
   // Creates a normal tabbed browser with the specified profile. The Browser's
   // window is created by this function call.
   static Browser* Create(Profile* profile);
 
   // Like Create, but creates a tabstrip-less popup window.
   static Browser* CreateForPopup(Profile* profile);
 
   // Like Create, but creates a tabstrip-less and toolbar-less "app" window for
-  // the specified app.
-  static Browser* CreateForApp(const std::wstring& app_name, Profile* profile);
+  // the specified app. Passing popup=true will create a TYPE_APP_POPUP browser
+  static Browser* CreateForApp(const std::wstring& app_name, Profile* profile,
+                               bool is_popup);
 
   // Set overrides for the initial window bounds and maximized state.
   void set_override_bounds(const gfx::Rect& bounds) {
     override_bounds_ = bounds;
   }
   void set_override_maximized(bool maximized) {
     override_maximized_ = maximized;
   }
 
   // Creates the Browser Window. Prefer to use the static helpers above where
@@ skipping 541 matching lines @@
   // The browser idle task helps cleanup unused memory resources when idle.
   scoped_ptr<BrowserIdleTimer> idle_task_;
 
   // Keep track of the encoding auto detect pref.
   BooleanPrefMember encoding_auto_detect_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_H_