skia: Add support for CHROMIUM_image backed textures.

src/gpu/gl/GrGLTexture.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 "GrGLTexture.h"
 #include "GrGLGpu.h"
 #include "SkTraceMemoryDump.h"
@@ skipping 19 matching lines @@
     SkASSERT(0 != idDesc.fInfo.fID);
     fTexParams.invalidate();
     fTexParamsTimestamp = GrGpu::kExpiredTimestamp;
     fInfo = idDesc.fInfo;
     fTextureIDLifecycle = idDesc.fLifeCycle;
 }
 
 void GrGLTexture::onRelease() {
     if (fInfo.fID) {
         if (GrGpuResource::kBorrowed_LifeCycle != fTextureIDLifecycle) {
+            if (desc().fTextureStorageAllocator.fDeallocateTextureStorage) {
+                desc().fTextureStorageAllocator.fDeallocateTextureStorage(
+                        desc().fTextureStorageAllocator.fCtx,
+                        reinterpret_cast<GrBackendObject>(&fInfo));
+            }
             GL_CALL(DeleteTextures(1, &fInfo.fID));

[bsalomon, 2016/02/01 14:54:42]

this->desc().

Shouldn't we be skipping DeleteTextures() here if the deallocator is used?

[erikchen, 2016/02/01 22:58:32]

Responded to both comments.

         }
         fInfo.fID = 0;
     }
     INHERITED::onRelease();
 }
 
 void GrGLTexture::onAbandon() {
     fInfo.fTarget = 0;
     fInfo.fID = 0;
     INHERITED::onAbandon();
 }
 
 GrBackendObject GrGLTexture::getTextureHandle() const {
 #ifdef SK_IGNORE_GL_TEXTURE_TARGET
     return static_cast<GrBackendObject>(this->textureID());
 #else
     return reinterpret_cast<GrBackendObject>(&fInfo);
 #endif
 }
 
 void GrGLTexture::setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
                                    const SkString& dumpName) const {
     SkString texture_id;
     texture_id.appendU32(this->textureID());
     traceMemoryDump->setMemoryBacking(dumpName.c_str(), "gl_texture",
                                       texture_id.c_str());
 }