[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

base/trace_event/process_memory_totals_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_totals_dump_provider.h"
 
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/process_memory_totals.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace trace_event {
 
 TEST(ProcessMemoryTotalsDumpProviderTest, DumpRSS) {
+  const MemoryDumpArgs high_detail_args = {
+      MemoryDumpArgs::LEVEL_OF_DETAIL_HIGH};
   auto pmtdp = ProcessMemoryTotalsDumpProvider::GetInstance();
   scoped_ptr<ProcessMemoryDump> pmd_before(new ProcessMemoryDump(nullptr));
   scoped_ptr<ProcessMemoryDump> pmd_after(new ProcessMemoryDump(nullptr));
 
   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 1024;
-  pmtdp->OnMemoryDump(pmd_before.get());
+  pmtdp->OnMemoryDump(high_detail_args, pmd_before.get());
 
   // Pretend that the RSS of the process increased of +1M.
   const size_t kAllocSize = 1048576;
   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing += kAllocSize;
 
-  pmtdp->OnMemoryDump(pmd_after.get());
+  pmtdp->OnMemoryDump(high_detail_args, pmd_after.get());
 
   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 0;
 
   ASSERT_TRUE(pmd_before->has_process_totals());
   ASSERT_TRUE(pmd_after->has_process_totals());
 
   const uint64 rss_before = pmd_before->process_totals()->resident_set_bytes();
   const uint64 rss_after = pmd_after->process_totals()->resident_set_bytes();
 
   EXPECT_NE(0U, rss_before);
   EXPECT_NE(0U, rss_after);
 
   EXPECT_EQ(rss_after - rss_before, kAllocSize);
 }
 
 }  // namespace trace_event
 }  // namespace base