Start cleaning up 64bit Win warnings

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
@@ skipping 670 matching lines @@
 
     int indexCountInCurrentSource() const {
         const GeometrySrcState& src = this->getGeomSrc();
         switch (src.fIndexSrc) {
             case kNone_GeometrySrcType:
                 return 0;
             case kReserved_GeometrySrcType:
             case kArray_GeometrySrcType:
                 return src.fIndexCount;
             case kBuffer_GeometrySrcType:
-                return src.fIndexBuffer->sizeInBytes() / sizeof(uint16_t);
+                return static_cast<int>(src.fIndexBuffer->sizeInBytes() / sizeof(uint16_t));
             default:
                 GrCrash("Unexpected Index Source.");
                 return 0;
         }
     }
 
     // This method is called by copySurface  The srcRect is guaranteed to be entirely within the
     // src bounds. Likewise, the dst rect implied by dstPoint and srcRect's width and height falls
     // entirely within the dst. The default implementation will draw a rect from the src to the
     // dst if the src is a texture and the dst is a render target and fail otherwise.
@@ skipping 173 matching lines @@
     const GrClipData*                                               fClip;
     GrDrawState*                                                    fDrawState;
     GrDrawState                                                     fDefaultDrawState;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by DrawTarget.
     GrContext*                                                      fContext;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif