Add support for creating texture backed images where Skia will delete the texture.

src/gpu/gl/GrGLInterface.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLExtensions.h"
@@ skipping 134 matching lines @@
         NULL == fFunctions.fGetBufferParameteriv ||
         NULL == fFunctions.fGenerateMipmap ||
         NULL == fFunctions.fGetError ||
         NULL == fFunctions.fGetIntegerv ||
         NULL == fFunctions.fGetProgramInfoLog ||
         NULL == fFunctions.fGetProgramiv ||
         NULL == fFunctions.fGetShaderInfoLog ||
         NULL == fFunctions.fGetShaderiv ||
         NULL == fFunctions.fGetString ||
         NULL == fFunctions.fGetUniformLocation ||
+#if 0 //  Not included in Chrome yet
+        NULL == fFunctions.fIsTexture ||
+#endif
         NULL == fFunctions.fLinkProgram ||
         NULL == fFunctions.fLineWidth ||
         NULL == fFunctions.fPixelStorei ||
         NULL == fFunctions.fReadPixels ||
         NULL == fFunctions.fScissor ||
         NULL == fFunctions.fShaderSource ||
         NULL == fFunctions.fStencilFunc ||
         NULL == fFunctions.fStencilMask ||
         NULL == fFunctions.fStencilOp ||
         NULL == fFunctions.fTexImage2D ||
@@ skipping 534 matching lines @@
             NULL == fFunctions.fGetDebugMessageLog ||
             NULL == fFunctions.fPushDebugGroup ||
             NULL == fFunctions.fPopDebugGroup ||
             NULL == fFunctions.fObjectLabel) {
             RETURN_FALSE_INTERFACE
         }
     }
 
     return true;
 }