Implement a benchmark for GrResourceCache

src/gpu/utils/GrUtils.cpp

Index: src/gpu/utils/GrUtils.cpp
diff --git a/src/gpu/utils/GrUtils.cpp b/src/gpu/utils/GrUtils.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0b0d203a911eb0ed74304d9782983bdb42a25ea8
--- /dev/null
+++ b/src/gpu/utils/GrUtils.cpp
@@ -0,0 +1,29 @@
+
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#if SK_SUPPORT_GPU
+
+#include "GrContext.h"
+#include "GrUtils.h"
+#include "GrRenderTarget.h"
+#include "SkCanvas.h"
+#include "SkDevice.h"
+
+// canvas could almost be a const&, but accessRenderTarget isn't const.
+GrContext* GrUtils::GetGr(SkCanvas* canvas) {
+    SkASSERT(NULL != canvas);
+    SkBaseDevice* device = canvas->getTopDevice();
+    GrRenderTarget* renderTarget = device->accessRenderTarget();
+    if (NULL != renderTarget) {
+        return renderTarget->getContext();
+    }
+
+    return NULL;
+}
+
+#endif