ui: Remove implicit flooring in skia rect conversion methods.

ui/gfx/rect_conversions.cc

Index: ui/gfx/rect_conversions.cc
diff --git a/ui/gfx/rect_conversions.cc b/ui/gfx/rect_conversions.cc
index 160c547a737c9d8ec5f1d8dd6f25dda6dcc2edd6..c0391b3d03953d1d1a5817752f73054d35eaff66 100644
--- a/ui/gfx/rect_conversions.cc
+++ b/ui/gfx/rect_conversions.cc
@@ -4,6 +4,9 @@
 
 #include "ui/gfx/rect_conversions.h"
 
+#include <cmath>
+
+#include "base/logging.h"
 #include "ui/gfx/safe_integer_conversions.h"
 
 namespace gfx {
@@ -28,6 +31,27 @@ Rect ToEnclosedRect(const RectF& rect) {
   return Rect(min_x, min_y, width, height);
 }
 
+Rect ToNearestRect(const RectF& rect) {
+  float float_min_x = rect.origin().x();
+  float float_min_y = rect.origin().y();
+  float float_max_x = float_min_x + rect.size().width();
+  float float_max_y = float_min_y + rect.size().height();
+
+  int min_x = ToRoundedInt(float_min_x);
+  int min_y = ToRoundedInt(float_min_y);
+  int max_x = ToRoundedInt(float_max_x);
+  int max_y = ToRoundedInt(float_max_y);
+
+  // If these DCHECKs fail, you're using the wrong method, consider using
+  // ToEnclosingRect or ToEnclosedRect instead.
+  DCHECK(std::abs(min_x - float_min_x) < 0.01f);
+  DCHECK(std::abs(min_y - float_min_y) < 0.01f);
+  DCHECK(std::abs(max_x - float_max_x) < 0.01f);
+  DCHECK(std::abs(max_y - float_max_y) < 0.01f);
+
+  return Rect(min_x, min_y, max_x - min_x, max_y - min_y);
+}
+
 Rect ToFlooredRectDeprecated(const RectF& rect) {
   return Rect(ToFlooredInt(rect.origin().x()),
               ToFlooredInt(rect.origin().y()),