Revert of Use the GrCacheable ID to eliminate the need for notifications to GrGpuGL when textures and RTs are…

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
diff --git a/src/gpu/gl/GrGpuGL.h b/src/gpu/gl/GrGpuGL.h
index 509c4c1573fde151e7bb11bb97ad423f5f342c8e..a2c636d2aad7fdd01089205075510de9e73c8765 100644
--- a/src/gpu/gl/GrGpuGL.h
+++ b/src/gpu/gl/GrGpuGL.h
@@ -105,6 +105,8 @@
     void notifyIndexBufferDelete(GrGLuint id) {
         fHWGeometryState.notifyIndexBufferDelete(id);
     }
+    void notifyTextureDelete(GrGLTexture* texture);
+    void notifyRenderTargetDelete(GrRenderTarget* renderTarget);
 
     // These functions should be used to generate and delete GL path names. They have their own
     // allocator that runs on the client side, so they are much faster than going through GenPaths.
@@ -462,8 +464,8 @@
     GrDrawState::DrawFace       fHWDrawFace;
     TriState                    fHWWriteToColor;
     TriState                    fHWDitherEnabled;
-    uint64_t                    fHWBoundRenderTargetInstanceID;
-    SkTArray<uint64_t, true>    fHWBoundTextureInstanceIDs;
+    GrRenderTarget*             fHWBoundRenderTarget;
+    SkTArray<GrTexture*, true>  fHWBoundTextures;
 
     struct PathTexGenData {
         GrGLenum  fMode;