Selectively perform JNI registration in render processes on Android.

base/android/jni_generator/jni_generator_helper.h

 // Copyright 2014 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_GENERATOR_JNI_GENERATOR_HELPER_H_
 #define BASE_ANDROID_JNI_GENERATOR_JNI_GENERATOR_HELPER_H_
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
@@ skipping 24 matching lines @@
 inline void HandleRegistrationError(JNIEnv* env,
                                     jclass clazz,
                                     const char* filename) {
   LOG(ERROR) << "RegisterNatives failed in " << filename;
 }
 
 inline void CheckException(JNIEnv* env) {
   base::android::CheckException(env);
 }
 
+inline bool ShouldSkipJniRegistration(bool is_maindex_class) {
+  base::android::JniRegistrationType jni_type =
+      base::android::FetchJniRegistrationType();
+  if (jni_type == base::android::NO_JNI_REGISTRATION) {
+    // TODO(estevenson): Change this to a DCHECK.
+    return true;
+  } else if (jni_type == base::android::ALL_JNI_REGISTRATION) {
+    return false;
+  } else if (jni_type == base::android::SELECTIVE_JNI_REGISTRATION) {
+    return !is_maindex_class;
+  } else {
+    NOTREACHED() << "g_jni_registration_type not set.";
+    return false;
+  }
+}
+
 }  // namespace jni_generator
 
 #endif  // BASE_ANDROID_JNI_GENERATOR_JNI_GENERATOR_HELPER_H_