Fix for MSAN unintialized value

src/gpu/effects/GrTextureDomain.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureDomain.h"
 #include "GrInvariantOutput.h"
 #include "GrSimpleTextureEffect.h"
@@ skipping 128 matching lines @@
             break;
         }
     }
 }
 
 void GrTextureDomain::GLDomain::setData(const GrGLProgramDataManager& pdman,
                                         const GrTextureDomain& textureDomain,
                                         GrSurfaceOrigin textureOrigin) {
     SkASSERT(textureDomain.mode() == fMode);
     if (kIgnore_Mode != textureDomain.mode()) {
-        GrGLfloat values[4] = {
+        GrGLfloat values[kPrevDomainCount] = {
             SkScalarToFloat(textureDomain.domain().left()),
             SkScalarToFloat(textureDomain.domain().top()),
             SkScalarToFloat(textureDomain.domain().right()),
             SkScalarToFloat(textureDomain.domain().bottom())
         };
         // vertical flip if necessary
         if (kBottomLeft_GrSurfaceOrigin == textureOrigin) {
             values[1] = 1.0f - values[1];
             values[3] = 1.0f - values[3];
             // The top and bottom were just flipped, so correct the ordering
             // of elements so that values = (l, t, r, b).
             SkTSwap(values[1], values[3]);
         }
-        if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
+        if (0 != memcmp(values, fPrevDomain, kPrevDomainCount * sizeof(GrGLfloat))) {
             pdman.set4fv(fDomainUni, 1, values);
-            memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
+            memcpy(fPrevDomain, values, kPrevDomainCount * sizeof(GrGLfloat));
         }
     }
 }
 
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GrGLTextureDomainEffect : public GrGLFragmentProcessor {
 public:
     GrGLTextureDomainEffect(const GrProcessor&);
@@ skipping 124 matching lines @@
     bool bilerp = mode != GrTextureDomain::kRepeat_Mode ? d->fRandom->nextBool() : false;
     GrCoordSet coords = d->fRandom->nextBool() ? kLocal_GrCoordSet : kDevice_GrCoordSet;
     return GrTextureDomainEffect::Create(d->fProcDataManager,
                                          d->fTextures[texIdx],
                                          matrix,
                                          domain,
                                          mode,
                                          bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
                                          coords);
 }