Change undefined SkGpuRenderTarget and SkGpuTexture forward declares to GrRenderTarget and GrTextur…

gm/texdata.cpp

Index: gm/texdata.cpp
diff --git a/gm/texdata.cpp b/gm/texdata.cpp
index 410fa6d2542d2f2c1ecb0b6e4b33cf8bb738e2bb..6281825d25c04bf272f823b647241cb2cda8af67 100644
--- a/gm/texdata.cpp
+++ b/gm/texdata.cpp
@@ -39,7 +39,7 @@ protected:
 
     virtual void onDraw(SkCanvas* canvas) {
         SkDevice* device = canvas->getTopDevice();
-        GrRenderTarget* target = (GrRenderTarget*) device->accessRenderTarget();
+        GrRenderTarget* target = device->accessRenderTarget();
         GrContext* ctx = GetGr();
         if (ctx && target) {
             SkPMColor gTextureData[(2 * S) * (2 * S)];