base: Get rid of 'using' declaration of StringAppendF.

chrome/test/automation/automation_proxy_uitest.cc

 // Copyright (c) 2010 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 <string>
 
 #include "app/app_switches.h"
 #include "app/message_box_flags.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 558 matching lines @@
     dom_automation_enabled_ = true;
     launch_arguments_ = CommandLine(CommandLine::NO_PROGRAM);
     launch_arguments_.AppendArgPath(document1_);
   }
 
   FilePath document1_;
 };
 
 std::wstring CreateJSStringForDOMQuery(const std::wstring& id) {
   std::wstring jscript(L"window.domAutomationController");
-  StringAppendF(&jscript, L".send(document.getElementById('%ls').nodeName);",
-                id.c_str());
+  base::StringAppendF(&jscript,
+                      L".send(document.getElementById('%ls').nodeName);",
+                      id.c_str());
   return jscript;
 }
 
 TEST_F(AutomationProxyTest3, FrameDocumentCanBeAccessed) {
   scoped_refptr<BrowserProxy> window(automation()->GetBrowserWindow(0));
   ASSERT_TRUE(window.get());
 
   scoped_refptr<TabProxy> tab(window->GetTab(0));
   ASSERT_TRUE(tab.get());
 
@@ skipping 1104 matching lines @@
   int diff_pixels_count = 0;
   for (int x = 0; x < img_size.width(); ++x) {
     for (int y = 0; y < img_size.height(); ++y) {
       if (*snapshot_bmp.getAddr32(x, y) != *reference_bmp.getAddr32(x, y)) {
         ++diff_pixels_count;
       }
     }
   }
   ASSERT_EQ(diff_pixels_count, 0);
 }