Update from https://crrev.com/327068

base/android/java_runtime.cc

Index: base/android/java_runtime.cc
diff --git a/base/android/java_runtime.cc b/base/android/java_runtime.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5be9adfd9fa339aa5ec2737730b69df997056746
--- /dev/null
+++ b/base/android/java_runtime.cc
@@ -0,0 +1,25 @@
+// 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/android/java_runtime.h"
+
+#include "jni/Runtime_jni.h"
+
+namespace base {
+namespace android {
+
+bool JavaRuntime::Register(JNIEnv* env) {
+  return JNI_Runtime::RegisterNativesImpl(env);
+}
+
+void JavaRuntime::GetMemoryUsage(long* total_memory, long* free_memory) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  base::android::ScopedJavaLocalRef<jobject> runtime =
+      JNI_Runtime::Java_Runtime_getRuntime(env);
+  *total_memory = JNI_Runtime::Java_Runtime_totalMemory(env, runtime.obj());
+  *free_memory = JNI_Runtime::Java_Runtime_freeMemory(env, runtime.obj());
+}
+
+}  // namespace android
+}  // namespace base