Add utf_string_conversions to base namespace.

chrome/browser/browser_keyevents_browsertest.cc

Index: chrome/browser/browser_keyevents_browsertest.cc
diff --git a/chrome/browser/browser_keyevents_browsertest.cc b/chrome/browser/browser_keyevents_browsertest.cc
index 6704bc13d4d7e844a1569380a84f050f4050e306..7fdfde315689770d107dc89bd13287b0cfe1a2bd 100644
--- a/chrome/browser/browser_keyevents_browsertest.cc
+++ b/chrome/browser/browser_keyevents_browsertest.cc
@@ -205,7 +205,7 @@ class BrowserKeyEventsTest : public InProcessBrowserTest {
         browser()->tab_strip_model()->GetWebContentsAt(tab_index),
         kGetFocusedElementJS,
         &actual));
-    ASSERT_EQ(WideToUTF8(focused), actual);
+    ASSERT_EQ(base::WideToUTF8(focused), actual);
   }
 
   void SetFocusedElement(int tab_index, const wchar_t* focused) {
@@ -226,7 +226,7 @@ class BrowserKeyEventsTest : public InProcessBrowserTest {
         browser()->tab_strip_model()->GetWebContentsAt(tab_index),
         base::StringPrintf(kGetTextBoxValueJS, id),
         &actual));
-    ASSERT_EQ(WideToUTF8(value), actual);
+    ASSERT_EQ(base::WideToUTF8(value), actual);
   }
 
   void SetTextBoxValue(int tab_index, const wchar_t* id,
@@ -237,7 +237,7 @@ class BrowserKeyEventsTest : public InProcessBrowserTest {
         browser()->tab_strip_model()->GetWebContentsAt(tab_index),
         base::StringPrintf(kSetTextBoxValueJS, id, value),
         &actual));
-    ASSERT_EQ(WideToUTF8(value), actual);
+    ASSERT_EQ(base::WideToUTF8(value), actual);
   }
 
   void StartTest(int tab_index, int result_length) {