Implement Wheel Gesture Scrolling on OSX.

ui/events/blink/input_handler_proxy_unittest.cc

Index: ui/events/blink/input_handler_proxy_unittest.cc
diff --git a/ui/events/blink/input_handler_proxy_unittest.cc b/ui/events/blink/input_handler_proxy_unittest.cc
index 6723a319952fa596f730a66cd20f0323523f6253..b798dc9858c471931b3dc5b5e836a6c333c3ef7e 100644
--- a/ui/events/blink/input_handler_proxy_unittest.cc
+++ b/ui/events/blink/input_handler_proxy_unittest.cc
@@ -104,6 +104,8 @@ class MockInputHandler : public cc::InputHandler {
   MOCK_METHOD2(RootScrollBegin,
                ScrollStatus(cc::ScrollState*,
                             cc::InputHandler::ScrollInputType type));
+  MOCK_METHOD1(ScrollAnimatedBegin,
+               ScrollStatus(const gfx::Point& viewport_point));
   MOCK_METHOD2(ScrollAnimated,
                ScrollStatus(const gfx::Point& viewport_point,
                             const gfx::Vector2dF& scroll_delta));
@@ -639,9 +641,8 @@ TEST_P(InputHandlerProxyTest, DISABLED_GestureScrollByCoarsePixels) {
   gesture_.type = WebInputEvent::GestureScrollBegin;
   gesture_.data.scrollBegin.deltaHintUnits =
       WebGestureEvent::ScrollUnits::Pixels;
-  EXPECT_CALL(mock_input_handler_, ScrollBegin(::testing::_, ::testing::_))
+  EXPECT_CALL(mock_input_handler_, ScrollAnimatedBegin(::testing::_))
       .WillOnce(testing::Return(kImplThreadScrollState));
-  EXPECT_CALL(mock_input_handler_, ScrollEnd(testing::_));
   EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
 
   gesture_.type = WebInputEvent::GestureScrollUpdate;