Add class GrGLTextureRenderTarget for GL texture/rendertarget objects

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index 2717b3192fa99991816ab9d4db87812d1e217808..21395409d64bb7b818ff520b8a0abf2bb0725008 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -6,21 +6,13 @@
  * found in the LICENSE file.
  */
 
-
 #include "GrContext.h"
 #include "GrDrawTargetCaps.h"
 #include "GrGpu.h"
-#include "GrRenderTarget.h"
 #include "GrResourceCache.h"
 #include "GrTexture.h"
 #include "GrTexturePriv.h"
 
-GrTexture::~GrTexture() {
-    if (fRenderTarget.get()) {
-        fRenderTarget.get()->owningTextureDestroyed();
-    }
-}
-
 void GrTexture::dirtyMipMaps(bool mipMapsDirty) {
     if (mipMapsDirty) {
         if (kValid_MipMapsStatus == fMipMapsStatus) {
@@ -53,18 +45,6 @@ size_t GrTexture::gpuMemorySize() const {
     return textureSize;
 }
 
-void GrTexture::onRelease() {
-
-    INHERITED::onRelease();
-}
-
-void GrTexture::onAbandon() {
-    if (fRenderTarget.get()) {
-        fRenderTarget->abandon();
-    }
-    INHERITED::onAbandon();
-}
-
 void GrTexture::validateDesc() const {
     if (this->asRenderTarget()) {
         // This texture has a render target
@@ -140,7 +120,6 @@ GrSurfaceOrigin resolve_origin(const GrSurfaceDesc& desc) {
 //////////////////////////////////////////////////////////////////////////////
 GrTexture::GrTexture(GrGpu* gpu, bool isWrapped, const GrSurfaceDesc& desc)
     : INHERITED(gpu, isWrapped, desc)
-    , fRenderTarget(NULL)
     , fMipMapsStatus(kNotAllocated_MipMapsStatus) {
     this->setScratchKey(GrTexturePriv::ComputeScratchKey(desc));
     // only make sense if alloc size is pow2