cc: Add a rails argument to InputHandler::ScrollBy

cc/trees/layer_tree_host_unittest_scroll.cc

 // Copyright 2012 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 "cc/trees/layer_tree_host.h"
 
 #include "base/memory/weak_ptr.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/picture_layer.h"
@@ skipping 575 matching lines @@
     // Ensure device scale factor matches the active tree.
     EXPECT_EQ(device_scale_factor_, impl->active_tree()->device_scale_factor());
     switch (impl->active_tree()->source_frame_number()) {
       case 0: {
         // GESTURE scroll on impl thread.
         InputHandler::ScrollStatus status = impl->ScrollBegin(
             gfx::ToCeiledPoint(expected_scroll_layer_impl->position() -
                                gfx::Vector2dF(0.5f, 0.5f)),
             InputHandler::GESTURE);
         EXPECT_EQ(InputHandler::SCROLL_STARTED, status);
-        impl->ScrollBy(gfx::Point(), scroll_amount_);
+        impl->ScrollBy(gfx::Point(), scroll_amount_,
+                       InputHandler::RAILS_MODE_FREE);
         impl->ScrollEnd();
 
         // Check the scroll is applied as a delta.
         EXPECT_VECTOR_EQ(initial_offset_,
                          expected_scroll_layer_impl->BaseScrollOffset());
         EXPECT_VECTOR_EQ(scroll_amount_,
                          expected_scroll_layer_impl->ScrollDelta());
         break;
       }
       case 1: {
         // WHEEL scroll on impl thread.
         InputHandler::ScrollStatus status = impl->ScrollBegin(
             gfx::ToCeiledPoint(expected_scroll_layer_impl->position() +
                                gfx::Vector2dF(0.5f, 0.5f)),
             InputHandler::WHEEL);
         EXPECT_EQ(InputHandler::SCROLL_STARTED, status);
-        impl->ScrollBy(gfx::Point(), scroll_amount_);
+        impl->ScrollBy(gfx::Point(), scroll_amount_,
+                       InputHandler::RAILS_MODE_FREE);
         impl->ScrollEnd();
 
         // Check the scroll is applied as a delta.
         EXPECT_VECTOR_EQ(javascript_scroll_,
                          expected_scroll_layer_impl->BaseScrollOffset());
         EXPECT_VECTOR_EQ(scroll_amount_,
                          expected_scroll_layer_impl->ScrollDelta());
         break;
       }
       case 2:
@@ skipping 606 matching lines @@
   RunTest(true, false, true);
 }
 
 TEST_F(LayerTreeHostScrollTestLayerStructureChange, ScrollDestroyWholeTree) {
   scroll_destroy_whole_tree_ = true;
   RunTest(true, false, true);
 }
 
 }  // namespace
 }  // namespace cc