[tracing] Adding Skia memory dump provider with cache totals

skia/ext/skia_memory_dump_provider_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/trace_event/process_memory_dump.h"
+#include "skia/ext/skia_memory_dump_provider.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace skia {
+
+TEST(SkiaMemoryDumpProviderTest, OnMemoryDump) {
+  scoped_ptr<base::trace_event::ProcessMemoryDump> process_memory_dump(
+      new base::trace_event::ProcessMemoryDump(nullptr));
+  SkiaMemoryDumpProvider::GetInstance()->OnMemoryDump(
+      process_memory_dump.get());
+
+  ASSERT_TRUE(process_memory_dump->GetAllocatorDump("skia/sk_font_cache"));
+  ASSERT_TRUE(process_memory_dump->GetAllocatorDump("skia/sk_resource_cache"));
+}
+
+}  // namespace skia