Revert of "Converted LayerImpl::bounds() to return SizeF."

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 1037 matching lines @@
     scroll_layer->SetScrollClipLayer(root->id());
 
     // Set max_scroll_offset = (100, 100).
     scroll_layer->SetBounds(
         gfx::Size(root->bounds().width() + 100, root->bounds().height() + 100));
     EXPECT_EQ(InputHandler::ScrollStarted,
               scroll_layer->TryScroll(gfx::PointF(0.0f, 1.0f),
                                       InputHandler::Gesture));
 
     // Set max_scroll_offset = (0, 0).
-    scroll_layer->SetBounds(gfx::ToCeiledSize(root->bounds()));
+    scroll_layer->SetBounds(root->bounds());
     EXPECT_EQ(InputHandler::ScrollIgnored,
               scroll_layer->TryScroll(gfx::PointF(0.0f, 1.0f),
                                       InputHandler::Gesture));
 
     // Set max_scroll_offset = (-100, -100).
     scroll_layer->SetBounds(gfx::Size());
     EXPECT_EQ(InputHandler::ScrollIgnored,
               scroll_layer->TryScroll(gfx::PointF(0.0f, 1.0f),
                                       InputHandler::Gesture));
 
@@ skipping 169 matching lines @@
   RunTest(true, false, true);
 }
 
 TEST_F(LayerTreeHostScrollTestLayerStructureChange, ScrollDestroyWholeTree) {
   scroll_destroy_whole_tree_ = true;
   RunTest(true, false, true);
 }
 
 }  // namespace
 }  // namespace cc