Use combined native/manual JNI registration.

base/android/jni_android.h

 // Copyright (c) 2012 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_JNI_ANDROID_H_
 #define BASE_ANDROID_JNI_ANDROID_H_
 
 #include <jni.h>
 #include <sys/types.h>
 
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/atomicops.h"
 #include "base/base_export.h"
 #include "base/compiler_specific.h"
 
 namespace base {
 namespace android {
 
 // Used to mark symbols to be exported in a shared library's symbol table.
 #define JNI_EXPORT __attribute__ ((visibility("default")))
 
+// Used to disable manual JNI registration in binaries that prefer to use native
+// JNI exports for startup performance. This is not compatible with the crazy
+// linker and so defaults to off. Call DisableManualJniRegistration at the very
+// beginning of JNI_OnLoad to use this.
+BASE_EXPORT bool IsManualJniRegistrationDisabled();
+BASE_EXPORT void DisableManualJniRegistration();
+
 // Contains the registration method information for initializing JNI bindings.
 struct RegistrationMethod {
   const char* name;
   bool (*func)(JNIEnv* env);
 };
 
 // Attaches the current thread to the VM (if necessary) and return the JNIEnv*.
 BASE_EXPORT JNIEnv* AttachCurrentThread();
 
 // Same to AttachCurrentThread except that thread name will be set to
@@ skipping 86 matching lines @@
 // and returns true.
 BASE_EXPORT bool ClearException(JNIEnv* env);
 
 // This function will call CHECK() macro if there's any pending exception.
 BASE_EXPORT void CheckException(JNIEnv* env);
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JNI_ANDROID_H_