Use IPC to wait for download in DownloadTest.

chrome/test/automation/browser_proxy.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_TEST_AUTOMATION_BROWSER_PROXY_H_
 #define CHROME_TEST_AUTOMATION_BROWSER_PROXY_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 160 matching lines @@
   bool RemoveBookmark(int64 id) WARN_UNUSED_RESULT;
 
   // Fills |*is_visible| with whether the browser's download shelf is currently
   // visible. The return value indicates success. On failure, |*is_visible| is
   // unchanged.
   bool IsShelfVisible(bool* is_visible) WARN_UNUSED_RESULT;
 
   // Shows or hides the download shelf.
   bool SetShelfVisible(bool is_visible) WARN_UNUSED_RESULT;
 
+  // Waits for the download shelf to appear or disappear.
+  bool WaitForDownloadShelfVisibilityChange(bool visibility) WARN_UNUSED_RESULT;
+
   // Sets the int value of the specified preference.
   bool SetIntPreference(const std::wstring& name, int value) WARN_UNUSED_RESULT;
 
   // Sets the string value of the specified preference.
   bool SetStringPreference(const std::wstring& name,
                            const std::wstring& value) WARN_UNUSED_RESULT;
 
   // Gets the boolean value of the specified preference.
   bool GetBooleanPreference(const std::wstring& name,
                             bool* value) WARN_UNUSED_RESULT;
@@ skipping 39 matching lines @@
   bool SendJSONRequest(const std::string& request,
                        std::string* response) WARN_UNUSED_RESULT;
 
  protected:
   virtual ~BrowserProxy() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserProxy);
 };
 
 #endif  // CHROME_TEST_AUTOMATION_BROWSER_PROXY_H_