Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/app_list/search/mixer_unittest.cc

 // Copyright 2013 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 "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/app_list/search/chrome_search_result.h"
 #include "chrome/browser/ui/app_list/search/history_types.h"
 #include "chrome/browser/ui/app_list/search/mixer.h"
 #include "chrome/browser/ui/app_list/search/search_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/app_list/app_list_model.h"
 
 namespace app_list {
 namespace test {
 
 class TestSearchResult : public ChromeSearchResult {
  public:
   TestSearchResult(const std::string& id, double relevance) {
     set_id(id);
-    set_title(UTF8ToUTF16(id));
+    set_title(base::UTF8ToUTF16(id));
     set_relevance(relevance);
   }
   virtual ~TestSearchResult() {}
 
  private:
   // ChromeSearchResult overides:
   virtual void Open(int event_flags) OVERRIDE {}
   virtual void InvokeAction(int action_index, int event_flags) OVERRIDE {}
   virtual scoped_ptr<ChromeSearchResult> Duplicate() OVERRIDE {
     return scoped_ptr<ChromeSearchResult>(
@@ skipping 68 matching lines @@
 
     mixer_->MixAndPublish(KnownResults());
   }
 
   std::string GetResults() const {
     std::string result;
     for (size_t i = 0; i < results_->item_count(); ++i) {
       if (!result.empty())
         result += ',';
 
-      result += UTF16ToUTF8(results_->GetItemAt(i)->title());
+      result += base::UTF16ToUTF8(results_->GetItemAt(i)->title());
     }
 
     return result;
   }
 
   Mixer* mixer() { return mixer_.get(); }
   TestSearchProvider* app_provider() { return providers_[0]; }
   TestSearchProvider* omnibox_provider() { return providers_[1]; }
   TestSearchProvider* webstore_provider() { return providers_[2]; }
 
@@ skipping 53 matching lines @@
   webstore_provider()->set_count(1);
 
   RunQuery();
 
   // Only three results with unique id are kept.
   EXPECT_EQ("dup0,dup1,dup2", GetResults());
 }
 
 }  // namespace test
 }  // namespace app_list