Work on Mac GN build

ui/events/gesture_detection/gesture_provider_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 "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 92 matching lines @@
         return true;
     }
     return false;
   }
 
   const GestureEventData& GetMostRecentGestureEvent() const {
     EXPECT_FALSE(gestures_.empty());
     return gestures_.back();
   }
 
-  const EventType GetMostRecentGestureEventType() const {
+  EventType GetMostRecentGestureEventType() const {
     EXPECT_FALSE(gestures_.empty());
     return gestures_.back().type;
   }
 
   size_t GetReceivedGestureCount() const { return gestures_.size(); }
 
   const GestureEventData& GetReceivedGesture(size_t index) const {
     EXPECT_LT(index, GetReceivedGestureCount());
     return gestures_[index];
   }
@@ skipping 1331 matching lines @@
 
   event = ObtainMotionEvent(event_time, MotionEvent::ACTION_CANCEL);
   event.pointer_count = 1;
   EXPECT_TRUE(gesture_provider_->OnTouchEvent(event));
   EXPECT_EQ(ET_GESTURE_END, GetMostRecentGestureEventType());
   EXPECT_EQ(12U, GetReceivedGestureCount());
   EXPECT_EQ(1, GetMostRecentGestureEvent().details.touch_points());
 }
 
 }  // namespace ui