Use a temp directory for downloads in WebstoreInstaller tests.

chrome/browser/extensions/webstore_installer_test.cc

 // Copyright 2013 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 "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/extensions/webstore_inline_installer.h"
 #include "chrome/browser/extensions/webstore_inline_installer_factory.h"
 #include "chrome/browser/extensions/webstore_installer_test.h"
 #include "chrome/browser/extensions/webstore_standalone_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 52 matching lines @@
   // functions don't get collected prematurely.
   command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose-gc");
 }
 
 void WebstoreInstallerTest::SetUpInProcessBrowserTestFixture() {
   host_resolver()->AddRule(webstore_domain_, "127.0.0.1");
   host_resolver()->AddRule(verified_domain_, "127.0.0.1");
   host_resolver()->AddRule(unverified_domain_, "127.0.0.1");
 }
 
+void WebstoreInstallerTest::SetUpOnMainThread() {
+  InProcessBrowserTest::SetUpOnMainThread();
+  ASSERT_TRUE(download_directory_.CreateUniqueTempDir());
+  DownloadPrefs* download_prefs = DownloadPrefs::FromBrowserContext(
+      browser()->profile());
+  download_prefs->SetDownloadPath(download_directory_.path());
+}
+
 GURL WebstoreInstallerTest::GenerateTestServerUrl(
     const std::string& domain,
     const std::string& page_filename) {
   GURL page_url = test_server()->GetURL(
       base::StringPrintf("files/%s/%s",
                          test_data_path_.c_str(),
                          page_filename.c_str()));
 
   GURL::Replacements replace_host;
   replace_host.SetHostStr(domain);
@@ skipping 26 matching lines @@
   return result == "KEEPGOING";
 }
 
 void WebstoreInstallerTest::RunTestAsync(
     const std::string& test_function_name) {
   std::string script = base::StringPrintf(
       "%s('%s')", test_function_name.c_str(), test_gallery_url_.c_str());
   browser()->tab_strip_model()->GetActiveWebContents()->GetMainFrame()->
       ExecuteJavaScript(base::UTF8ToUTF16(script));
 }