Make cursor highlighting feature work across multiple displays

chrome/browser/chromeos/ui/accessibility_focus_ring_controller.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 CHROME_BROWSER_CHROMEOS_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_H_
 
 #include <vector>
 
+#include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/singleton.h"
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/ui/accessibility_cursor_ring_layer.h"
 #include "chrome/browser/chromeos/ui/accessibility_focus_ring_layer.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace chromeos {
 
@@ skipping 32 matching lines @@
   // that currently has focus, populate a vector of one or more
   // AccessibilityFocusRings that surround the rectangles. Adjacent or
   // overlapping rectangles are combined first. This function is protected
   // so it can be unit-tested.
   void RectsToRings(const std::vector<gfx::Rect>& rects,
                     std::vector<AccessibilityFocusRing>* rings) const;
 
   virtual int GetMargin() const;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(AccessibilityFocusRingControllerTest,
+                           CursorWorksOnMultipleDisplays);
+
   // FocusRingLayerDelegate overrides.
   void OnDeviceScaleFactorChanged() override;
   void OnAnimationStep(base::TimeTicks timestamp) override;
 
   void UpdateFocusRingsFromFocusRects();
 
   void AnimateFocusRings(base::TimeTicks timestamp);
   void AnimateCursorRing(base::TimeTicks timestamp);
   void AnimateCaretRing(base::TimeTicks timestamp);
 
@@ skipping 34 matching lines @@
   std::unique_ptr<AccessibilityCursorRingLayer> caret_layer_;
 
   friend struct base::DefaultSingletonTraits<AccessibilityFocusRingController>;
 
   DISALLOW_COPY_AND_ASSIGN(AccessibilityFocusRingController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_H_