Remove enclosingIntRect(const IntRect&) and adjust all call sites.

Source/core/platform/graphics/IntRect.h

Index: Source/core/platform/graphics/IntRect.h
diff --git a/Source/core/platform/graphics/IntRect.h b/Source/core/platform/graphics/IntRect.h
index a6767a304756f93dcc617bebfc21ab7043549071..97b77da3c7afce7f7e4d2d1af736497d4615b2dc 100644
--- a/Source/core/platform/graphics/IntRect.h
+++ b/Source/core/platform/graphics/IntRect.h
@@ -194,13 +194,6 @@ inline bool operator!=(const IntRect& a, const IntRect& b)
     return a.location() != b.location() || a.size() != b.size();
 }
 
-// FIXME: This method is here only to ease the transition to sub-pixel layout. It should
-// be removed when we close http://webkit.org/b/60318
-inline IntRect enclosingIntRect(const IntRect& rect)
-{
-    return rect;
-}
-
 #if OS(DARWIN)
 IntRect enclosingIntRect(const CGRect&);
 #if !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)