Selectively perform JNI registration in render processes on Android.

base/android/jni_android.cc

 // 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.
 
 #include "base/android/jni_android.h"
 
 #include <stddef.h>
 
 #include <map>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_string.h"
 #include "base/android/jni_utils.h"
 #include "base/debug/debugging_flags.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/threading/thread_local.h"
 
 namespace {
 using base::android::GetClass;
 using base::android::MethodID;
 using base::android::ScopedJavaLocalRef;
 
-bool g_disable_manual_jni_registration = false;
+base::android::JniRegistrationType g_jni_registration_type =
+    base::android::UNINITIALIZED_JNI_REGISTRATION;
 
 JavaVM* g_jvm = NULL;
 base::LazyInstance<base::android::ScopedJavaGlobalRef<jobject> >::Leaky
     g_class_loader = LAZY_INSTANCE_INITIALIZER;
 jmethodID g_class_loader_load_class_method_id = 0;
 
 #if BUILDFLAG(ENABLE_PROFILING) && HAVE_TRACE_STACK_FRAME_POINTERS
 base::LazyInstance<base::ThreadLocalPointer<void>>::Leaky
     g_stack_frame_pointer = LAZY_INSTANCE_INITIALIZER;
 #endif
 
 }  // namespace
 
 namespace base {
 namespace android {
 
-bool IsManualJniRegistrationDisabled() {
-  return g_disable_manual_jni_registration;
+JniRegistrationType FetchJniRegistrationType() {
+  if (g_jni_registration_type == UNINITIALIZED_JNI_REGISTRATION) {
+    g_jni_registration_type = GetJniRegistrationType(AttachCurrentThread());
+  }
+  return g_jni_registration_type;
 }
 
 void DisableManualJniRegistration() {
-  DCHECK(!g_disable_manual_jni_registration);
-  g_disable_manual_jni_registration = true;
+  g_jni_registration_type = NO_JNI_REGISTRATION;
 }
 
 JNIEnv* AttachCurrentThread() {
   DCHECK(g_jvm);
   JNIEnv* env = NULL;
   jint ret = g_jvm->AttachCurrentThread(&env, NULL);
   DCHECK_EQ(JNI_OK, ret);
   return env;
 }
 
@@ skipping 243 matching lines @@
 }
 
 void* JNIStackFrameSaver::SavedFrame() {
   return g_stack_frame_pointer.Pointer()->Get();
 }
 
 #endif  // ENABLE_PROFILING && HAVE_TRACE_STACK_FRAME_POINTERS
 
 }  // namespace android
 }  // namespace base