add SK_OVERRIDEs, move impl of virtuals into .cpp



git-svn-id: http://skia.googlecode.com/svn/trunk@2819 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 5daf42c..df2ac22 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -375,6 +375,10 @@
     }
 }
 
+SkGpuRenderTarget* SkGpuDevice::accessRenderTarget() { 
+    return (SkGpuRenderTarget*)fRenderTarget; 
+}
+
 bool SkGpuDevice::bindDeviceAsTexture(GrPaint* paint) {
     if (NULL != fTexture) {
         paint->setTexture(kBitmapTextureIdx, fTexture);
@@ -1744,6 +1748,10 @@
     return false;
 }
 
+void SkGpuDevice::flush() {
+    fContext->flush(false);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SkGpuDevice::TexCache SkGpuDevice::lockCachedTexture(const SkBitmap& bitmap,