Remove scroll_delta flooring hack

cc/test/layer_tree_test.cc

 // Copyright 2011 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/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 373 matching lines @@
   void WillBeginMainFrame() override { test_hooks_->WillBeginMainFrame(); }
 
   void DidBeginMainFrame() override { test_hooks_->DidBeginMainFrame(); }
 
   void BeginMainFrame(const BeginFrameArgs& args) override {
     test_hooks_->BeginMainFrame(args);
   }
 
   void Layout() override { test_hooks_->Layout(); }
 
-  void ApplyViewportDeltas(const gfx::Vector2d& inner_delta,
-                           const gfx::Vector2d& outer_delta,
+  void ApplyViewportDeltas(const gfx::Vector2dF& inner_delta,
+                           const gfx::Vector2dF& outer_delta,
                            const gfx::Vector2dF& elastic_overscroll_delta,
                            float page_scale,
                            float top_controls_delta) override {
     test_hooks_->ApplyViewportDeltas(inner_delta, outer_delta,
                                      elastic_overscroll_delta, page_scale,
                                      top_controls_delta);
   }
   void ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
                            float scale,
                            float top_controls_delta) override {
@@ skipping 466 matching lines @@
   return -1;
 }
 
 void LayerTreeTest::DestroyLayerTreeHost() {
   if (layer_tree_host_ && layer_tree_host_->root_layer())
     layer_tree_host_->root_layer()->SetLayerTreeHost(NULL);
   layer_tree_host_ = nullptr;
 }
 
 }  // namespace cc