Cleanup CanDownload WebContentsDelegate API

chrome/browser/download/download_request_limiter_unittest.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 "chrome/browser/download/download_request_limiter.h"
 
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_infobar_delegate.h"
@@ skipping 108 matching lines @@
     DownloadRequestInfoBarDelegate::SetCallbackForTesting(NULL);
   }
 
   void CanDownload() {
     CanDownloadFor(web_contents());
   }
 
   void CanDownloadFor(WebContents* web_contents) {
     download_request_limiter_->CanDownloadImpl(
         web_contents,
-        -1,  // request id
         "GET",  // request method
         base::Bind(&DownloadRequestLimiterTest::ContinueDownload,
                    base::Unretained(this)));
     base::RunLoop().RunUntilIdle();
   }
 
   void OnUserGesture() {
     OnUserGestureFor(web_contents());
   }
 
@@ skipping 314 matching lines @@
   CanDownload();
   ExpectAndResetCounts(0, 1, 0, __LINE__);
   ASSERT_EQ(DownloadRequestLimiter::PROMPT_BEFORE_DOWNLOAD,
             download_request_limiter_->GetDownloadStatus(web_contents()));
 
   CanDownload();
   ExpectAndResetCounts(0, 1, 0, __LINE__);
   ASSERT_EQ(DownloadRequestLimiter::PROMPT_BEFORE_DOWNLOAD,
             download_request_limiter_->GetDownloadStatus(web_contents()));
 }