Use Blink's flag to prevent fling boosting.

content/renderer/input/input_handler_proxy_unittest.cc

 // 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.
 
 #include "content/renderer/input/input_handler_proxy.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/swap_promise_monitor.h"
 #include "content/common/input/did_overscroll_params.h"
@@ skipping 1936 matching lines @@
   EXPECT_CALL(mock_input_handler_,
               ScrollBy(testing::_,
                        testing::Property(&gfx::Vector2dF::x,
                                          testing::Eq(expected_delta))))
       .WillOnce(testing::Return(scroll_result_did_scroll_));
   input_handler_->Animate(time);
 
   VERIFY_AND_RESET_MOCKS();
 }
 
+TEST_F(InputHandlerProxyTest, NoFlingBoostIfPreventBoostingFlagIsSet) {
+  base::TimeDelta dt = base::TimeDelta::FromMilliseconds(10);
+  base::TimeTicks time = base::TimeTicks() + dt;
+  WebFloatPoint fling_delta = WebFloatPoint(1000, 0);
+  WebPoint fling_point = WebPoint(7, 13);
+
+  StartFling(
+      time, blink::WebGestureDeviceTouchscreen, fling_delta, fling_point);
+
+  EXPECT_CALL(mock_input_handler_, ScrollEnd());
+
+  // Cancel the fling. The fling cancellation should not be deferred because of
+  // prevent boosting flag set.
+  gesture_.data.flingCancel.preventBoosting = true;
+  time += dt;
+  CancelFling(time);
+
+  // VERIFY_AND_RESET_MOCKS already called by CancelFling
+}
+
 TEST_F(InputHandlerProxyTest, FlingBoostTerminatedDuringScrollSequence) {
   base::TimeDelta dt = base::TimeDelta::FromMilliseconds(10);
   base::TimeTicks time = base::TimeTicks() + dt;
   base::TimeTicks last_animate_time = time;
   WebFloatPoint fling_delta = WebFloatPoint(1000, 0);
   WebPoint fling_point = WebPoint(7, 13);
   StartFling(
       time, blink::WebGestureDeviceTouchscreen, fling_delta, fling_point);
 
   // Now cancel the fling.  The fling cancellation should be deferred to allow
@@ skipping 98 matching lines @@
   EXPECT_CALL(mock_input_handler_, SetNeedsAnimate());
   EXPECT_CALL(mock_client, DidAnimateForInput());
   base::TimeTicks time = base::TimeTicks() + base::TimeDelta::FromSeconds(10);
   input_handler_->Animate(time);
 
   testing::Mock::VerifyAndClearExpectations(&mock_client);
 }
 
 } // namespace
 } // namespace content