Use base namespace for string16 in chrome/renderer.

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index 8ca4de30cbe4b3ceb3b3f39b3fcfebfe31744582..77a2f9a73bf2c380e6e8e95839d4e6f5ff0f9ce1 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -32,7 +32,7 @@ class SearchBox : public content::RenderViewObserver,
   void LogEvent(NTPLoggingEventType event);
 
   // Sends ChromeViewHostMsg_ChromeIdentityCheck to the browser.
-  void CheckIsUserSignedInToChromeAs(const string16& identity);
+  void CheckIsUserSignedInToChromeAs(const base::string16& identity);
 
   // Sends ChromeViewHostMsg_SearchBoxDeleteMostVisitedItem to the browser.
   void DeleteMostVisitedItem(InstantRestrictedID most_visited_item_id);
@@ -77,7 +77,7 @@ class SearchBox : public content::RenderViewObserver,
                      bool is_most_visited_item_url);
 
   // Sends ChromeViewHostMsg_SearchBoxPaste to the browser.
-  void Paste(const string16& text);
+  void Paste(const base::string16& text);
 
   const ThemeBackgroundInfo& GetThemeBackgroundInfo();
 
@@ -102,7 +102,7 @@ class SearchBox : public content::RenderViewObserver,
   bool is_input_in_progress() const { return is_input_in_progress_; }
   bool is_key_capture_enabled() const { return is_key_capture_enabled_; }
   bool display_instant_results() const { return display_instant_results_; }
-  const string16& query() const { return query_; }
+  const base::string16& query() const { return query_; }
   int start_margin() const { return start_margin_; }
   const InstantSuggestion& suggestion() const { return suggestion_; }
 
@@ -110,7 +110,7 @@ class SearchBox : public content::RenderViewObserver,
   // Overridden from content::RenderViewObserver:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
-  void OnChromeIdentityCheckResult(const string16& identity,
+  void OnChromeIdentityCheckResult(const base::string16& identity,
                                    bool identity_match);
   void OnDetermineIfPageSupportsInstant();
   void OnFocusChanged(OmniboxFocusState new_focus_state,
@@ -122,7 +122,7 @@ class SearchBox : public content::RenderViewObserver,
   void OnSetDisplayInstantResults(bool display_instant_results);
   void OnSetInputInProgress(bool input_in_progress);
   void OnSetSuggestionToPrefetch(const InstantSuggestion& suggestion);
-  void OnSubmit(const string16& query);
+  void OnSubmit(const base::string16& query);
   void OnThemeChanged(const ThemeBackgroundInfo& theme_info);
   void OnToggleVoiceSearch();
 
@@ -142,7 +142,7 @@ class SearchBox : public content::RenderViewObserver,
   bool display_instant_results_;
   InstantRestrictedIDCache<InstantMostVisitedItem> most_visited_items_cache_;
   ThemeBackgroundInfo theme_info_;
-  string16 query_;
+  base::string16 query_;
   int start_margin_;
   InstantSuggestion suggestion_;
   int width_;