Update SplitString calls to new form

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
@@ skipping 2458 matching lines @@
       DownloadUrlParameters::FromWebContents(this, url));
   params->set_referrer(referrer);
   params->set_post_id(post_id);
   if (post_id >= 0)
     params->set_method("POST");
   params->set_prompt(true);
 
   if (headers.empty()) {
     params->set_prefer_cache(true);
   } else {
-    std::vector<std::string> key_value_list;
-    base::SplitString(headers, '\n', &key_value_list);
-    for (const auto& key_value : key_value_list) {
-      std::vector<std::string> pair;
-      base::SplitString(key_value, ':', &pair);
+    for (const base::StringPiece& key_value :
+         base::SplitStringPiece(
+             headers, "\n", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
+      std::vector<std::string> pair = base::SplitString(
+          key_value, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
       DCHECK_EQ(2ul, pair.size());
       params->add_request_header(pair[0], pair[1]);
     }
   }
   dlm->DownloadUrl(params.Pass());
 }
 
 void WebContentsImpl::GenerateMHTML(
     const base::FilePath& file,
     const base::Callback<void(int64)>& callback) {
@@ skipping 2132 matching lines @@
   player_map->erase(it);
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content