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

chrome/common/logging_chrome.cc

Index: chrome/common/logging_chrome.cc
diff --git a/chrome/common/logging_chrome.cc b/chrome/common/logging_chrome.cc
index 59019c5fc78bd98754a6c06e8acdf9e03e3130f4..3587cbb1ec42641e236d3f49de47bfa8648b36a1 100644
--- a/chrome/common/logging_chrome.cc
+++ b/chrome/common/logging_chrome.cc
@@ -436,7 +436,7 @@ size_t GetFatalAssertions(AssertionList* assertions) {
   while (!log_file.eof()) {
     getline(log_file, utf8_line);
     if (utf8_line.find(":FATAL:") != std::string::npos) {
-      wide_line = UTF8ToWide(utf8_line);
+      wide_line = base::UTF8ToWide(utf8_line);
       if (assertions)
         assertions->push_back(wide_line);
       ++assertion_count;