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

chrome/browser/autocomplete/autocomplete_result.cc

Index: chrome/browser/autocomplete/autocomplete_result.cc
diff --git a/chrome/browser/autocomplete/autocomplete_result.cc b/chrome/browser/autocomplete/autocomplete_result.cc
index 1a198c36f48111497d4b00c30098ac30789280f6..f5ed15dc439b073f472bd1aa4e8b0e076d675066 100644
--- a/chrome/browser/autocomplete/autocomplete_result.cc
+++ b/chrome/browser/autocomplete/autocomplete_result.cc
@@ -194,11 +194,15 @@ void AutocompleteResult::SortAndCull(const AutocompleteInput& input,
   default_match_ = matches_.begin();
 
   if (default_match_ != matches_.end()) {
-    const base::string16 debug_info = ASCIIToUTF16("fill_into_edit=") +
-        default_match_->fill_into_edit + ASCIIToUTF16(", provider=") +
-        ((default_match_->provider != NULL) ?
-         ASCIIToUTF16(default_match_->provider->GetName()) : base::string16()) +
-        ASCIIToUTF16(", input=") + input.text();
+    const base::string16 debug_info =
+        base::ASCIIToUTF16("fill_into_edit=") +
+        default_match_->fill_into_edit +
+        base::ASCIIToUTF16(", provider=") +
+        ((default_match_->provider != NULL)
+            ? base::ASCIIToUTF16(default_match_->provider->GetName())
+            : base::string16()) +
+        base::ASCIIToUTF16(", input=") +
+        input.text();
     DCHECK(default_match_->allowed_to_be_default_match) << debug_info;
     // We shouldn't get query matches for URL inputs, or non-query matches
     // for query inputs.