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

chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc

Index: chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc
diff --git a/chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc b/chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc
index f1380c934d4e6da6c9d37efdbd887eff895e6f06..0ee92b6e4492f2b2e759d1af8633b8d91015d3f4 100644
--- a/chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc
+++ b/chrome/browser/speech/speech_recognition_bubble_controller_unittest.cc
@@ -126,7 +126,7 @@ class SpeechRecognitionBubbleControllerTest
   static void ActivateBubble() {
     if (MockSpeechRecognitionBubble::type() !=
         MockSpeechRecognitionBubble::BUBBLE_TEST_FOCUS_CHANGED) {
-      test_fixture_->controller_->SetBubbleMessage(ASCIIToUTF16("Test"));
+      test_fixture_->controller_->SetBubbleMessage(base::ASCIIToUTF16("Test"));
     }
   }