Cache render targets that render to wrapped textures

src/gpu/gl/GrGLGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 124 matching lines @@
     GrTexture* onCreateTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
                                const SkTArray<GrMipLevel>& texels) override;
     GrTexture* onCreateCompressedTexture(const GrSurfaceDesc& desc,
                                          SkBudgeted budgeted,
                                          const SkTArray<GrMipLevel>& texels) override;
 
     GrBuffer* onCreateBuffer(GrBufferType, size_t size, GrAccessPattern) override;
     GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&, GrWrapOwnership) override;
     GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&,
                                               GrWrapOwnership) override;
+    void onComputeBackendTextureKeyForWrapAsRenderTarget(const GrBackendTextureDesc&,
+                                                         GrUniqueKey*) override;
+    bool onRewrapRenderTargetWithBackendTexture(const GrBackendTextureDesc&,
+                                                GrRenderTarget*) override;
     GrRenderTarget* onWrapBackendTextureAsRenderTarget(const GrBackendTextureDesc&) override;
     // Given a GrPixelConfig return the index into the stencil format array on GrGLCaps to a
     // compatible stencil format, or negative if there is no compatible stencil format.
     int getCompatibleStencilIndex(GrPixelConfig config);
 
     // If |desc.fTextureStorageAllocator| exists, use that to create the
     // texture. Otherwise, create the texture directly.
     // Returns whether the texture is successfully created. On success, the
     // result is stored in |info|.
     // The texture is populated with |texels|, if it exists.
@@ skipping 452 matching lines @@
     bool fHWPLSEnabled;
     bool fPLSHasBeenUsed;
 
     float fHWMinSampleShading;
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif