Cache render targets that render to wrapped textures

include/gpu/GrTextureProvider.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureProvider_DEFINED
 #define GrTextureProvider_DEFINED
 
@@ skipping 39 matching lines @@
 
     /** Assigns a unique key to the texture. The texture will be findable via this key using
         findTextureByUniqueKey(). If an existing texture has this key, it's key will be removed. */
     void assignUniqueKeyToTexture(const GrUniqueKey& key, GrTexture* texture) {
         this->assignUniqueKeyToResource(key, texture);
     }
 
     /** Finds a texture by unique key. If the texture is found it is ref'ed and returned. */
     GrTexture* findAndRefTextureByUniqueKey(const GrUniqueKey& key);
 
+    /** Finds a render target by unique key. If the render target is found it is ref'ed and
+     * returned. */
+    GrRenderTarget* findAndRefRenderTargetByUniqueKey(const GrUniqueKey& key);
+
     /**
      * Determines whether a texture is associated with the unique key. If the texture is found it
      * will not be locked or returned. This call does not affect the priority of the resource for
      * deletion.
      */
     bool existsTextureWithUniqueKey(const GrUniqueKey& key) const {
         return this->existsResourceWithUniqueKey(key);
     }
 
     /**
@@ skipping 95 matching lines @@
 
 private:
     GrResourceCache* fCache;
     GrGpu* fGpu;
 
     // In debug builds we guard against improper thread handling
     SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;)
 };
 
 #endif