Android: Remove unneeded RegisterNatives() calls

base/android/java_runtime.h

 // 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.
 
 #ifndef BASE_ANDROID_JAVA_RUNTIME_H_
 #define BASE_ANDROID_JAVA_RUNTIME_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/base_export.h"
 
 namespace base {
 namespace android {
 
 // Wrapper class for using the java.lang.Runtime object from jni.
 class BASE_EXPORT JavaRuntime {
  public:
-  // Registers the jni class (once per process).
-  static bool Register(JNIEnv* env);
-
   // Fills the total memory used and memory allocated for objects by the java
   // heap in the current process. Returns true on success.
   static void GetMemoryUsage(long* total_memory, long* free_memory);
 };
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JAVA_RUNTIME_H_