[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

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));
+  base::trace_event::MemoryDumpArgs dump_args = {
+      base::trace_event::MemoryDumpArgs::LEVEL_OF_DETAIL_HIGH};
   SkiaMemoryDumpProvider::GetInstance()->OnMemoryDump(
-      process_memory_dump.get());
+      dump_args, 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