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

src/gpu/GrGpuResource.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 "GrGpuResource.h"
 #include "GrContext.h"
@@ skipping 127 matching lines @@
 
     // There is no need to call our notifyAllCntsAreZero function at this point since we already
     // told the cache about the state of cnts.
     return false;
 }
 
 void GrGpuResource::setScratchKey(const GrScratchKey& scratchKey) {
     SkASSERT(!fScratchKey.isValid());
     SkASSERT(scratchKey.isValid());
     // Wrapped resources can never have a scratch key.
-    if (this->isWrapped()) {
+    if (this->cacheAccess().isExternal()) {
         return;
     }
     fScratchKey = scratchKey;
 }
 
 void GrGpuResource::removeScratchKey() {
     if (!this->wasDestroyed() && fScratchKey.isValid()) {
         get_resource_cache(fGpu)->resourceAccess().willRemoveScratchKey(this);
         fScratchKey.reset();
     }
@@ skipping 14 matching lines @@
 }
 
 uint32_t GrGpuResource::CreateUniqueID() {
     static int32_t gUniqueID = SK_InvalidUniqueID;
     uint32_t id;
     do {
         id = static_cast<uint32_t>(sk_atomic_inc(&gUniqueID) + 1);
     } while (id == SK_InvalidUniqueID);
     return id;
 }