Inline LayoutRect::enclosingIntRect

Noticed this function was hot on blink_perf.paint's color-changes.html
microbenchmark. With this patch, color-changes.html runs 2.7% faster
(average -0.8ms) but that number should be taken with a grain of salt
since it's near the standard deviation of the test.

Manual profiling with and without the patch confirmed this function is
no longer hot.

Review-Url: https://codereview.chromium.org/2550083002
Cr-Commit-Position: refs/heads/master@{#436323}

third_party/WebKit/Source/platform/geometry/LayoutRect.cpp

@@ -152,13 +152,6 @@ LayoutRect unionRectEvenIfEmpty(const Vector<LayoutRect>& rects) {
   return result;
 }
 
-IntRect enclosingIntRect(const LayoutRect& rect) {
-  IntPoint location = flooredIntPoint(rect.minXMinYCorner());
-  IntPoint maxPoint = ceiledIntPoint(rect.maxXMaxYCorner());
-
-  return IntRect(location, maxPoint - location);
-}
-
 LayoutRect enclosingLayoutRect(const FloatRect& rect) {
   LayoutPoint location = flooredLayoutPoint(rect.minXMinYCorner());
   LayoutPoint maxPoint = ceiledLayoutPoint(rect.maxXMaxYCorner());

third_party/WebKit/Source/platform/geometry/LayoutRect.h

@@ -278,7 +278,12 @@ inline IntRect pixelSnappedIntRect(const LayoutRect& rect) {
                          snapSizeToPixel(rect.height(), rect.y())));
 }
 
-PLATFORM_EXPORT IntRect enclosingIntRect(const LayoutRect&);
+inline IntRect enclosingIntRect(const LayoutRect& rect) {
+  IntPoint location = flooredIntPoint(rect.minXMinYCorner());
+  IntPoint maxPoint = ceiledIntPoint(rect.maxXMaxYCorner());
+  return IntRect(location, maxPoint - location);
+}
+
 PLATFORM_EXPORT LayoutRect enclosingLayoutRect(const FloatRect&);
 
 inline IntRect pixelSnappedIntRect(LayoutUnit left,