Android: lazy initialization for method id.

content/browser/android/download_controller.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 "content/browser/android/download_controller.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 11 matching lines @@
 #include "net/cookies/cookie_options.h"
 #include "net/cookies/cookie_store.h"
 #include "net/http/http_request_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 
 using base::android::AttachCurrentThread;
 using base::android::CheckException;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::GetClass;
+using base::android::MethodID;
 using base::android::ScopedJavaLocalRef;
 
 namespace {
 const char kDownloadControllerClassPathName[] =
     "org/chromium/content/browser/DownloadController";
 }  // namespace
 
 namespace content {
 
 // JNI methods
@@ skipping 252 matching lines @@
 }
 
 DownloadController::JavaObject* DownloadController::GetJavaObject() {
   if (!java_object_) {
     // Initialize Java DownloadController by calling
     // DownloadController.getInstance(), which will call Init()
     // if Java DownloadController is not instantiated already.
     JNIEnv* env = AttachCurrentThread();
     ScopedJavaLocalRef<jclass> clazz =
         GetClass(env, kDownloadControllerClassPathName);
-    jmethodID get_instance = GetStaticMethodID(env, clazz, "getInstance",
-        "()Lorg/chromium/content/browser/DownloadController;");
+    jmethodID get_instance = MethodID::Get<
+        MethodID::METHODTYPE_NORMAL, MethodID::EXCEPTIONCHECK_YES>(
+            env, clazz.obj(), "getInstance",
+            "()Lorg/chromium/content/browser/DownloadController;");
     ScopedJavaLocalRef<jobject> jobj(env,
         env->CallStaticObjectMethod(clazz.obj(), get_instance));
     CheckException(env);
   }
 
   DCHECK(java_object_);
   return java_object_;
 }
 
 DownloadController::DownloadInfoAndroid::DownloadInfoAndroid(
     net::URLRequest* request) {
   request->GetResponseHeaderByName("content-disposition", &content_disposition);
   request->GetResponseHeaderByName("mime-type", &original_mime_type);
   request->extra_request_headers().GetHeader(
       net::HttpRequestHeaders::kUserAgent, &user_agent);
   GURL referer_url(request->GetSanitizedReferrer());
   if (referer_url.is_valid())
     referer = referer_url.spec();
   if (!request->url_chain().empty()) {
     original_url = request->url_chain().front();
     url = request->url_chain().back();
   }
 }
 
 DownloadController::DownloadInfoAndroid::~DownloadInfoAndroid() {}
 
 }  // namespace content