Move JoinString to the base namespace

media/capture/capture_resolution_chooser.cc

 // Copyright 2015 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 "media/capture/capture_resolution_chooser.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/strings/string_util.h"
@@ skipping 213 matching lines @@
   }
 
   // Reverse ordering, so that sizes are from smallest to largest.
   std::reverse(snapped_sizes_.begin(), snapped_sizes_.end());
 
   if (VLOG_IS_ON(1)) {
     std::vector<std::string> stringified_sizes;
     for (const gfx::Size& size : snapped_sizes_)
       stringified_sizes.push_back(size.ToString());
     VLOG_STREAM(1) << "Recomputed snapped frame sizes: "
-                   << JoinString(stringified_sizes, " <--> ");
+                   << base::JoinString(stringified_sizes, " <--> ");
   }
 }
 
 }  // namespace media