Change undefined SkGpuRenderTarget and SkGpuTexture forward declares to GrRenderTarget and GrTexture.

R=robertphillips@google.com, reed@google.com

Author: bsalomon@google.com

Review URL: https://chromiumcodereview.appspot.com/17269003

git-svn-id: http://skia.googlecode.com/svn/trunk@9775 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkDeferredCanvas.cpp b/src/utils/SkDeferredCanvas.cpp
index 89997a1..da3c72e 100644
--- a/src/utils/SkDeferredCanvas.cpp
+++ b/src/utils/SkDeferredCanvas.cpp
@@ -163,7 +163,7 @@
     virtual uint32_t getDeviceCapabilities() SK_OVERRIDE;
     virtual int width() const SK_OVERRIDE;
     virtual int height() const SK_OVERRIDE;
-    virtual SkGpuRenderTarget* accessRenderTarget() SK_OVERRIDE;
+    virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
 
     virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config,
                                                int width, int height,
@@ -435,7 +435,7 @@
     return immediateDevice()->height();
 }
 
-SkGpuRenderTarget* DeferredDevice::accessRenderTarget() {
+GrRenderTarget* DeferredDevice::accessRenderTarget() {
     this->flushPendingCommands(kNormal_PlaybackMode);
     return immediateDevice()->accessRenderTarget();
 }