Add an OR operator overload for SaveFlags to avoid extra static casts.

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 1489 matching lines @@
     // the caller must respect the restrictions associated with peekPixels().
     bool asROBitmap(SkBitmap*) const;
 
 private:
     SkBitmap    fBitmap;    // used if peekPixels() fails
     const void* fAddr;      // NULL on failure
     SkImageInfo fInfo;
     size_t      fRowBytes;
 };
 
+static inline SkCanvas::SaveFlags operator|(const SkCanvas::SaveFlags lhs,
+                                            const SkCanvas::SaveFlags rhs) {
+    return static_cast<SkCanvas::SaveFlags>(lhs | rhs);
+}
+
+static inline SkCanvas::SaveFlags& operator|=(SkCanvas::SaveFlags& lhs,
+                                              const SkCanvas::SaveFlags rhs) {
+    lhs = lhs | rhs;
+    return lhs;
+}
+
+
 #endif