ui: Add IsExpressibleAsRect() method to RectF

ui/gfx/safe_integer_conversions.cc

 // Copyright (c) 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 "ui/gfx/safe_integer_conversions.h"
 
 #include <cmath>
 #include <limits>
 
 namespace gfx {
 
 int ClampToInt(float value) {
   if (value != value)
-     return 0; // no int NaN.
+    return 0; // no int NaN.

[sky, 2012/11/02 17:54:30]

nit: spacing is off.

[danakj, 2012/11/02 18:01:30]

this is supposed to be fixing the spacing, but it looks weird here too. i'll
double check it.

   if (value >= std::numeric_limits<int>::max())
     return std::numeric_limits<int>::max();
   if (value <= std::numeric_limits<int>::min())
     return std::numeric_limits<int>::min();
   return static_cast<int>(value);
 }
 
 int ToFlooredInt(float value) {
   return ClampToInt(std::floor(value));
 }
 
 int ToCeiledInt(float value) {
   return ClampToInt(std::ceil(value));
 }
 
 int ToRoundedInt(float value) {
   float rounded;
   if (value >= 0.0f)
     rounded = std::floor(value + 0.5f);
   else
     rounded = std::ceil(value - 0.5f);
   return ClampToInt(rounded);
 }
 
+bool IsExpressibleAsInt(float value) {
+  if (value != value)
+    return false; // no int NaN.
+  if (value > std::numeric_limits<int>::max())
+    return false;
+  if (value < std::numeric_limits<int>::min())
+    return false;
+  return true;
+}
+
 }  // namespace gfx