Use GrTextureDomain in GrBicubicEffect to perform non-bleeding HQ filter drawBitmap.

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 13 matching lines @@
 public:
     enum Mode {
         kIgnore_Mode,  // Ignore the texture domain rectangle.
         kClamp_Mode,   // Clamp texture coords to the domain rectangle.
         kDecal_Mode,   // Treat the area outside the domain rectangle as fully transparent.
 
         kLastMode = kDecal_Mode
     };
     static const int kModeCount = kLastMode + 1;
 
+    static const GrTextureDomain& IgnoredDomain() {
+        static const SkRect gDummyRect = {0, 0, 0, 0};
+        static const GrTextureDomain gDomain(gDummyRect, kIgnore_Mode);
+        return gDomain;
+    }
+
     /**
      * @param index     Pass a value >= 0 if using multiple texture domains in the same effect.
      *                  It is used to keep inserted variables from causing name collisions.
      */
     GrTextureDomain(const SkRect& domain, Mode, int index = -1);
 
     const SkRect& domain() const { return fDomain; }
     Mode mode() const { return fMode; }
 
     /* Computes a domain that bounds all the texels in texelRect. Note that with bilerp enabled
@@ skipping 116 matching lines @@
                           GrCoordSet);
 
     virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
 
     GR_DECLARE_EFFECT_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif