ui: Remove implicit flooring in skia rect conversion methods.

The current SkRectToRect method implicitly floors all components of thre rect
and this is bad. Replace this method with SkRectToRectF which keeps everything
as floating point.

We also add a conversion method from RectF to SkRect.

Tests:
ui_unittests:RectTest.SkiaRectConversions

R=sky
BUG=147395
Moved From: https://codereview.chromium.org/11275089/

Review URL: https://chromiumcodereview.appspot.com/11359172

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@167620 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 0 deletions

diff --git a/ui/gfx/rect_conversions.h b/ui/gfx/rect_conversions.h
index c8170cc..7c971b3 100644
--- a/ui/gfx/rect_conversions.h
+++ b/ui/gfx/rect_conversions.h
@@ -16,6 +16,12 @@ UI_EXPORT Rect ToEnclosingRect(const RectF& rect);
 // Returns the largest Rect that is enclosed by the given RectF.
 UI_EXPORT Rect ToEnclosedRect(const RectF& rect);
 
+// Returns the Rect after snapping the corners of the RectF to an integer grid.
+// This should only be used when the RectF you provide is expected to be an
+// integer rect with floating point error. If it is an arbitrary RectF, then
+// you should use a different method.
+UI_EXPORT Rect ToNearestRect(const RectF& rect);
+
 // Returns a Rect obtained by flooring the values of the given RectF.
 // Please prefer the previous two functions in new code.
 UI_EXPORT Rect ToFlooredRectDeprecated(const RectF& rect);