jni_generator: Always generate native exports.

base/android/jni_generator/testSingleJNIAdditionalImport.golden

Index: base/android/jni_generator/testSingleJNIAdditionalImport.golden
diff --git a/base/android/jni_generator/testSingleJNIAdditionalImport.golden b/base/android/jni_generator/testSingleJNIAdditionalImport.golden
index 1b2895eefce62c92f9d6ca0963b06461aa937f6f..0aa0f36611aa2df862c7788dba759d6938283c4e 100644
--- a/base/android/jni_generator/testSingleJNIAdditionalImport.golden
+++ b/base/android/jni_generator/testSingleJNIAdditionalImport.golden
@@ -20,8 +20,8 @@
 namespace {
 const char kFooClassPath[] = "org/chromium/foo/Foo";
 // Leaking this jclass as we cannot use LazyInstance from some threads.
-jclass g_Foo_clazz = NULL;
-#define Foo_clazz(env) g_Foo_clazz
+base::subtle::AtomicWord g_Foo_clazz __attribute__((unused)) = 0;
+#define Foo_clazz(env) base::android::LazyGetClass(env, kFooClassPath, &g_Foo_clazz)
 
 }  // namespace
 
@@ -30,8 +30,8 @@ jclass g_Foo_clazz = NULL;
 static void DoSomething(JNIEnv* env, const JavaParamRef<jclass>& jcaller,
     const JavaParamRef<jobject>& callback);
 
-static void Java_org_chromium_foo_Foo_nativeDoSomething(JNIEnv* env, jclass
-    jcaller,
+extern "C" __attribute__((visibility("default")))
+void Java_org_chromium_foo_Foo_nativeDoSomething(JNIEnv* env, jclass jcaller,
     jobject callback) {
   return DoSomething(env, JavaParamRef<jclass>(env, jcaller),
       JavaParamRef<jobject>(env, callback));
@@ -71,9 +71,7 @@ static const JNINativeMethod kMethodsFoo[] = {
 };
 
 static bool RegisterNativesImpl(JNIEnv* env) {
-
-  g_Foo_clazz = reinterpret_cast<jclass>(env->NewGlobalRef(
-      base::android::GetClass(env, kFooClassPath).obj()));
+  if (base::android::IsManualJniRegistrationDisabled()) return true;
 
   const int kMethodsFooSize = arraysize(kMethodsFoo);