ui: Remove implicit flooring in skia rect conversion methods.

ash/wm/image_grid.cc

Index: ash/wm/image_grid.cc
diff --git a/ash/wm/image_grid.cc b/ash/wm/image_grid.cc
index facd566666da27a6a31c0ac96026a9b03d7348b6..369ab8289d41acd5dd015f9d0a491eb75c90bbd1 100644
--- a/ash/wm/image_grid.cc
+++ b/ash/wm/image_grid.cc
@@ -11,6 +11,7 @@
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/rect.h"
+#include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/transform.h"
 
 using std::max;
@@ -19,9 +20,9 @@ using std::min;
 namespace ash {
 namespace internal {
 
-gfx::Rect ImageGrid::TestAPI::GetTransformedLayerBounds(
+gfx::RectF ImageGrid::TestAPI::GetTransformedLayerBounds(
     const ui::Layer& layer) {
-  gfx::Rect bounds = layer.bounds();
+  gfx::RectF bounds = layer.bounds();
   layer.transform().TransformRect(&bounds);
   return bounds;
 }