Move clip off of draw target

include/core/SkRect.h

Index: include/core/SkRect.h
diff --git a/include/core/SkRect.h b/include/core/SkRect.h
index 06f8abe0e444c2e496c05f9e9cdf36e601124d19..69c2dc9cefbed347f006ab69d2f425b4b5e9d630 100644
--- a/include/core/SkRect.h
+++ b/include/core/SkRect.h
@@ -11,6 +11,8 @@
 #include "SkPoint.h"
 #include "SkSize.h"
 
+struct SkRect;
+
 /** \struct SkIRect
 
     SkIRect holds four 32 bit integer coordinates for a rectangle
@@ -244,6 +246,10 @@ struct SK_API SkIRect {
                 fRight >= r.fRight && fBottom >= r.fBottom;
     }
 
+    /** Returns true if the specified rectangle r is inside or equal to this rectangle.
+    */
+    bool contains(const SkRect& r) const;
+
     /** Return true if this rectangle contains the specified rectangle.
         For speed, this method does not check if either this or the specified
         rectangles are empty, and if either is, its return value is undefined.
@@ -880,4 +886,10 @@ public:
     void dumpHex() const { this->dump(true); }
 };
 
+inline bool SkIRect::contains(const SkRect& r) const {
+    return  !r.isEmpty() && !this->isEmpty() &&     // check for empties
+            (SkScalar)fLeft <= r.fLeft && (SkScalar)fTop <= r.fTop &&
+            (SkScalar)fRight >= r.fRight && (SkScalar)fBottom >= r.fBottom;
+}
+
 #endif