Fix HostZoomMap related crash from r86367. Re-enable PDFBrowserTest.Slow_Loading.

chrome/test/plugin/pdf_browsertest.cc

 // Copyright (c) 2011 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/file_util.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 251 matching lines @@
 
   std::string text;
   clipboard.ReadAsciiText(ui::Clipboard::BUFFER_STANDARD, &text);
   ASSERT_EQ("adipiscing", text);
 }
 
 // Tests that loading async pdfs works correctly (i.e. document fully loads).
 // This also loads all documents that used to crash, to ensure we don't have
 // regressions.
 // Flaky as per http://crbug.com/74548.
-IN_PROC_BROWSER_TEST_F(PDFBrowserTest, DISABLED_SLOW_Loading) {
+IN_PROC_BROWSER_TEST_F(PDFBrowserTest, FLAKY_SLOW_Loading) {
   ASSERT_TRUE(pdf_test_server()->Start());
 
   NavigationController* controller =
       &(browser()->GetSelectedTabContents()->controller());
   NotificationRegistrar registrar;
   registrar.Add(this,
                 NotificationType::LOAD_STOP,
                 Source<NavigationController>(controller));
   std::string base_url = std::string("files/");
 
@@ skipping 56 matching lines @@
   ASSERT_TRUE(ui_test_utils::ExecuteJavaScript(
       browser()->GetSelectedTabContents()->render_view_host(),
       std::wstring(),
       L"reloadPDF();"));
 
   ASSERT_TRUE(ui_test_utils::WaitForNavigationInCurrentTab(browser()));
   ASSERT_EQ("success", browser()->GetSelectedTabContents()->GetURL().query());
 }
 
 }  // namespace