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

src/gpu/GrBitmapTextContext.h

Index: src/gpu/GrBitmapTextContext.h
diff --git a/src/gpu/GrBitmapTextContext.h b/src/gpu/GrBitmapTextContext.h
index b9d5ce78d51ebfbba24833381081cc04b95f409f..95e65abcc09132132d55b6dc068a29f000bfcc26 100644
--- a/src/gpu/GrBitmapTextContext.h
+++ b/src/gpu/GrBitmapTextContext.h
@@ -48,7 +48,7 @@ private:
     int32_t                     fMaxVertices;
     GrTexture*                  fCurrTexture;
     SkAutoTUnref<GrEffect>      fCachedEffect;
-    uint32_t                    fEffectTextureGenID;
+    uint32_t                    fEffectTextureInstanceID;
     int                         fCurrVertex;
     SkRect                      fVertexBounds;
 };