Merge 153342 - Print preview: Use an ID instead of memory pointer string in WebUI.

chrome/browser/ui/webui/print_preview/print_preview_data_source.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 "chrome/browser/ui/webui/print_preview/print_preview_data_source.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/memory/ref_counted_memory.h"
@@ skipping 177 matching lines @@
   // Parent class handles most requests except for the print preview data.
   if (!EndsWith(path, "/print.pdf", true)) {
     ChromeWebUIDataSource::StartDataRequest(path, is_incognito, request_id);
     return;
   }
 
   // Print Preview data.
   scoped_refptr<base::RefCountedBytes> data;
   std::vector<std::string> url_substr;
   base::SplitString(path, '/', &url_substr);
+  int preview_ui_id = -1;
   int page_index = 0;
-  if (url_substr.size() == 3 && base::StringToInt(url_substr[1], &page_index)) {
+  if (url_substr.size() == 3 &&
+      base::StringToInt(url_substr[0], &preview_ui_id),
+      base::StringToInt(url_substr[1], &page_index) &&
+      preview_ui_id >= 0) {
     PrintPreviewDataService::GetInstance()->GetDataEntry(
-        url_substr[0], page_index, &data);
+        preview_ui_id, page_index, &data);
   }
   if (data.get()) {
     SendResponse(request_id, data);
     return;
   }
   // Invalid request.
   scoped_refptr<base::RefCountedBytes> empty_bytes(new base::RefCountedBytes);
   SendResponse(request_id, empty_bytes);
 }