Add WidgetTest::GetAllWidgets() to find dialogs created by TestBrowserDialog.

ui/views/test/widget_test.h

 // Copyright 2013 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 UI_VIEWS_TEST_WIDGET_TEST_H_
 #define UI_VIEWS_TEST_WIDGET_TEST_H_
 
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "build/build_config.h"
@@ skipping 72 matching lines @@
   // processor.
   static ui::EventProcessor* GetEventProcessor(Widget* widget);
 
   // Get the InputMethodDelegate, for setting on a Mock InputMethod in tests.
   static ui::internal::InputMethodDelegate* GetInputMethodDelegateForWidget(
       Widget* widget);
 
   // Return true if |window| is transparent according to the native platform.
   static bool IsNativeWindowTransparent(gfx::NativeWindow window);
 
+  // Returns the set of all Widgets that currently have a NativeWindow.
+  static Widget::Widgets GetAllWidgets();
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WidgetTest);
 };
 
 // A helper WidgetDelegate for tests that require hooks into WidgetDelegate
 // calls, and removes some of the boilerplate for initializing a Widget. Calls
 // Widget::CloseNow() when destroyed if it hasn't already been done.
 class TestDesktopWidgetDelegate : public WidgetDelegate {
  public:
   TestDesktopWidgetDelegate();
@@ skipping 68 matching lines @@
   bool observed_;
   bool active_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetActivationWaiter);
 };
 
 }  // namespace test
 }  // namespace views
 
 #endif  // UI_VIEWS_TEST_WIDGET_TEST_H_