Remove now-unnecessary .obj() in Java method calls.

base/android/java_runtime.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/android/java_runtime.h"
 
 #include "jni/Runtime_jni.h"
 
 namespace base {
 namespace android {
 
 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());
+  *total_memory = JNI_Runtime::Java_Runtime_totalMemory(env, runtime);
+  *free_memory = JNI_Runtime::Java_Runtime_freeMemory(env, runtime);
 }
 
 }  // namespace android
 }  // namespace base