Introduce the MicButtonTargeter class

ui/views/view_targeter_unittest.cc

 // 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.
 
 #include "ui/views/view_targeter.h"
 
 #include "ui/events/event_targeter.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/path.h"
 #include "ui/views/masked_view_targeter.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/widget/root_view.h"
 
 namespace views {
 
 // A class used to define a triangular-shaped hit test mask on a View.
 class TestMaskedViewTargeter : public MaskedViewTargeter {
  public:
   explicit TestMaskedViewTargeter(View* masked_view)
       : MaskedViewTargeter(masked_view) {}
   virtual ~TestMaskedViewTargeter() {}
 
  private:
-  virtual bool GetHitTestMask(View* view, gfx::Path* mask) const OVERRIDE {
+  virtual bool GetHitTestMask(const View* view,
+                              gfx::Path* mask) const OVERRIDE {
     SkScalar w = SkIntToScalar(view->width());
     SkScalar h = SkIntToScalar(view->height());
 
     // Create a triangular mask within the bounds of |view|.
     mask->moveTo(w / 2, 0);
     mask->lineTo(w, h);
     mask->lineTo(0, h);
     mask->close();
 
     return true;
@@ skipping 244 matching lines @@
   scroll.set_location(gfx::Point(300, 12));
   current_target = targeter->FindTargetForEvent(root_view, &scroll);
   EXPECT_EQ(&unmasked_view, static_cast<View*>(current_target));
 
   // TODO(tdanderson): We should also test that targeting of masked views
   //                   works correctly with gestures. See crbug.com/375822.
 }
 
 }  // namespace test
 }  // namespace views