Add benchmarkstream to visualbench

tools/VisualBench/VisualSKPBench.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ */
+
+#include "VisualSKPBench.h"
+
+VisualSKPBench::VisualSKPBench(const char* name, const SkPicture* pic)
+    : fPic(SkRef(pic))
+    , fName(name) {
+    fUniqueName.printf("%s", name);
+}
+
+const char* VisualSKPBench::onGetName() {
+    return fName.c_str();
+}
+
+const char* VisualSKPBench::onGetUniqueName() {
+    return fUniqueName.c_str();
+}
+
+bool VisualSKPBench::isSuitableFor(Backend backend) {
+    return backend != kNonRendering_Backend;
+}
+
+void VisualSKPBench::onDraw(const int loops, SkCanvas* canvas) {
+    for (int i = 0; i < loops; i++) {
+        canvas->drawPicture(fPic);
+    }
+}