Switch SnapshotTabHelper to use WebContentsUserData.

chrome/browser/ui/pdf/pdf_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.
 
 #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 65 matching lines @@
 
     GURL url(ui_test_utils::GetTestUrl(
         GetPDFTestDir(),
         FilePath(FILE_PATH_LITERAL("pdf_browsertest.pdf"))));
     ui_test_utils::NavigateToURL(browser(), url);
   }
 
   bool VerifySnapshot(const std::string& expected_filename) {
     snapshot_different_ = true;
     expected_filename_ = expected_filename;
-    TabContents* tab_contents =  chrome::GetActiveTabContents(browser());
-    tab_contents->snapshot_tab_helper()->CaptureSnapshot();
+    WebContents* web_contents =  chrome::GetActiveWebContents(browser());
+    SnapshotTabHelper::FromWebContents(web_contents)->CaptureSnapshot();
     ui_test_utils::RegisterAndWait(
         this,
         chrome::NOTIFICATION_TAB_SNAPSHOT_TAKEN,
-        content::Source<WebContents>(tab_contents->web_contents()));
+        content::Source<WebContents>(web_contents));
     if (snapshot_different_) {
       LOG(INFO) << "Rendering didn't match, see result " <<
           snapshot_filename_.value().c_str();
     }
     return !snapshot_different_;
   }
 
   void WaitForResponse() {
     // Even if the plugin has loaded the data or scrolled, because of how
     // pepper painting works, we might not have the data.  One way to force this
@@ skipping 287 matching lines @@
       chrome::GetActiveWebContents(browser())->GetRenderViewHost(),
       std::wstring(),
       L"reloadPDF();"));
   observer.Wait();
 
   ASSERT_EQ("success",
             chrome::GetActiveWebContents(browser())->GetURL().query());
 }
 
 }  // namespace