Update from https://crrev.com/327068

base/trace_event/java_heap_dump_provider_android.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/java_heap_dump_provider_android.h"
+
+#include "base/android/java_runtime.h"
+#include "base/trace_event/process_memory_dump.h"
+
+namespace base {
+namespace trace_event {
+
+namespace {
+
+const char kDumperFriendlyName[] = "JavaHeap";
+const char kDumperName[] = "java_heap";
+
+}  // namespace
+
+// static
+JavaHeapDumpProvider* JavaHeapDumpProvider::GetInstance() {
+  return Singleton<JavaHeapDumpProvider,
+                   LeakySingletonTraits<JavaHeapDumpProvider>>::get();
+}
+
+JavaHeapDumpProvider::JavaHeapDumpProvider() {
+}
+
+JavaHeapDumpProvider::~JavaHeapDumpProvider() {
+}
+
+// Called at trace dump point time. Creates a snapshot with the memory counters
+// for the current process.
+bool JavaHeapDumpProvider::DumpInto(ProcessMemoryDump* pmd) {
+  MemoryAllocatorDump* dump =
+      pmd->CreateAllocatorDump(kDumperName, MemoryAllocatorDump::kRootHeap);
+
+  // These numbers come from java.lang.Runtime stats.
+  long total_heap_size = 0;
+  long free_heap_size = 0;
+  android::JavaRuntime::GetMemoryUsage(&total_heap_size, &free_heap_size);
+  dump->set_physical_size_in_bytes(total_heap_size);
+  dump->set_allocated_objects_count(0);
+  dump->set_allocated_objects_size_in_bytes(total_heap_size - free_heap_size);
+  return true;
+}
+
+const char* JavaHeapDumpProvider::GetFriendlyName() const {
+  return kDumperFriendlyName;
+}
+
+}  // namespace trace_event
+}  // namespace base