Fix == operator in GrTextureDomain so we don't compair uninitilized values

src/gpu/effects/GrTextureDomain.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureDomainEffect_DEFINED
 #define GrTextureDomainEffect_DEFINED
 
@@ skipping 50 matching lines @@
         SkRect result = {
             texelRect.fLeft * wInv,
             texelRect.fTop * hInv,
             texelRect.fRight * wInv,
             texelRect.fBottom * hInv
         };
         return result;
     }
 
     bool operator== (const GrTextureDomain& that) const {
-        return fMode == that.fMode && fDomain == that.fDomain;
+        return fMode == that.fMode && (kIgnore_Mode == fMode || fDomain == that.fDomain);
     }
 
     /**
      * A GrGLEffect subclass that corresponds to a GrEffect subclass that uses GrTextureDomain
      * should include this helper. It generates the texture domain GLSL, produces the part of the
      * effect key that reflects the texture domain code, and performs the uniform uploads necessary
      * for texture domains.
      */
     class GLDomain {
     public:
@@ skipping 91 matching lines @@
                           GrCoordSet);
 
     virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
 
     GR_DECLARE_EFFECT_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif