Make scroll offset type of float in cc

cc/trees/layer_tree_host_unittest_animation.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 "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
@@ skipping 1011 matching lines @@
     : public LayerTreeHostAnimationTest {
  public:
   LayerTreeHostAnimationTestScrollOffsetChangesArePropagated() {}
 
   virtual void SetupTree() OVERRIDE {
     LayerTreeHostAnimationTest::SetupTree();
 
     scroll_layer_ = FakeContentLayer::Create(&client_);
     scroll_layer_->SetScrollClipLayerId(layer_tree_host()->root_layer()->id());
     scroll_layer_->SetBounds(gfx::Size(1000, 1000));
-    scroll_layer_->SetScrollOffset(gfx::Vector2d(10, 20));
+    scroll_layer_->SetScrollOffset(gfx::ScrollOffset(10, 20));
     layer_tree_host()->root_layer()->AddChild(scroll_layer_);
   }
 
   virtual void BeginTest() OVERRIDE {
     PostSetNeedsCommitToMainThread();
   }
 
   virtual void DidCommit() OVERRIDE {
     switch (layer_tree_host()->source_frame_number()) {
       case 1: {
         scoped_ptr<ScrollOffsetAnimationCurve> curve(
             ScrollOffsetAnimationCurve::Create(
-                gfx::Vector2dF(500.f, 550.f),
+                gfx::ScrollOffset(500.f, 550.f),
                 EaseInOutTimingFunction::Create()));
         scoped_ptr<Animation> animation(
             Animation::Create(curve.Pass(), 1, 0, Animation::ScrollOffset));
         animation->set_needs_synchronized_start_time(true);
         bool animation_added = scroll_layer_->AddAnimation(animation.Pass());
         bool impl_scrolling_supported =
             layer_tree_host()->proxy()->SupportsImplScrolling();
         EXPECT_EQ(impl_scrolling_supported, animation_added);
         if (!impl_scrolling_supported)
           EndTest();
@@ skipping 228 matching lines @@
  private:
   scoped_refptr<Layer> content_;
   int num_swap_buffers_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostAnimationTestAddAnimationAfterAnimating);
 
 }  // namespace
 }  // namespace cc