Extracting NetLog inner classes into their own classes.

content/browser/download/download_browsertest.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.
 
 // This file contains download browser tests that are known to be runnable
 // in a pure content context.  Over time tests should be migrated here.
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
@@ skipping 53 matching lines @@
 #endif
 
 using ::testing::AllOf;
 using ::testing::Field;
 using ::testing::InSequence;
 using ::testing::Property;
 using ::testing::Return;
 using ::testing::StrictMock;
 using ::testing::_;
 
+namespace net {
+class NetLogWithSource;
+}
+
 namespace content {
 
 namespace {
 
 class MockDownloadItemObserver : public DownloadItem::Observer {
  public:
   MockDownloadItemObserver() {}
   virtual ~MockDownloadItemObserver() {}
 
   MOCK_METHOD1(OnDownloadUpdated, void(DownloadItem*));
@@ skipping 2460 matching lines @@
   GURL document_url =
       origin_two.GetURL("/iframe-host.html?target=" + frame_url.spec());
   DownloadItem* download = StartDownloadAndReturnItem(shell(), document_url);
   WaitForCompletion(download);
 
   EXPECT_STREQ(FILE_PATH_LITERAL("download-test.lib"),
                download->GetTargetFilePath().BaseName().value().c_str());
 }
 
 }  // namespace content