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

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 108 matching lines @@
     // GrGpu overrides
     void onResetContext(uint32_t resetBits) override;
 
     GrTexture* onCreateTexture(const GrSurfaceDesc& desc, GrGpuResource::LifeCycle lifeCycle,
                                const void* srcData, size_t rowBytes) override;
     GrTexture* onCreateCompressedTexture(const GrSurfaceDesc& desc,
                                          GrGpuResource::LifeCycle lifeCycle,
                                          const void* srcData) override;
     GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) override;
     GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) override;
-    GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) override;
-    GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) override;
+    GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&, GrWrapOwnership) override;
+    GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&,
+                                              GrWrapOwnership) override;
     bool createStencilAttachmentForRenderTarget(GrRenderTarget* rt, int width, int height) override;
     bool attachStencilAttachmentToRenderTarget(GrStencilAttachment* sb,
                                                GrRenderTarget* rt) override;
 
     void onClear(GrRenderTarget*, const SkIRect* rect, GrColor color,
                  bool canIgnoreRect) override;
 
     void onClearStencilClip(GrRenderTarget*, const SkIRect& rect, bool insideClip) override;
 
     bool onReadPixels(GrRenderTarget* target,
@@ skipping 354 matching lines @@
 
     // we record what stencil format worked last time to hopefully exit early
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif