Add base:: to string16s in win8/.

win8/metro_driver/secondary_tile.cc

Index: win8/metro_driver/secondary_tile.cc
diff --git a/win8/metro_driver/secondary_tile.cc b/win8/metro_driver/secondary_tile.cc
index 97ff63d1f7f584ce556077f5eb6f7d88d1d6622a..d892199b8d6abddb2c8ea755319d9e60e4c6e0b9 100644
--- a/win8/metro_driver/secondary_tile.cc
+++ b/win8/metro_driver/secondary_tile.cc
@@ -89,7 +89,7 @@ HRESULT TileRequestCompleter::Respond(winfoundtn::IAsyncOperation<bool>* async,
   return S_OK;
 }
 
-void DeleteTileFromStartScreen(const string16& tile_id,
+void DeleteTileFromStartScreen(const base::string16& tile_id,
                                const MetroPinUmaResultCallback& callback) {
   DVLOG(1) << __FUNCTION__;
   mswr::ComPtr<winui::StartScreen::ISecondaryTileFactory> tile_factory;
@@ -121,9 +121,9 @@ void DeleteTileFromStartScreen(const string16& tile_id,
   completer->Complete(completion);
 }
 
-void CreateTileOnStartScreen(const string16& tile_id,
-                             const string16& title_str,
-                             const string16& url_str,
+void CreateTileOnStartScreen(const base::string16& tile_id,
+                             const base::string16& title_str,
+                             const base::string16& url_str,
                              const base::FilePath& logo_path,
                              const MetroPinUmaResultCallback& callback) {
   VLOG(1) << __FUNCTION__;
@@ -156,7 +156,8 @@ void CreateTileOnStartScreen(const string16& tile_id,
   CheckHR(hr, "Failed to create URIFactory");
 
   mswrw::HString logo_url;
-  logo_url.Attach(MakeHString(string16(L"file:///").append(logo_path.value())));
+  logo_url.Attach(
+      MakeHString(base::string16(L"file:///").append(logo_path.value())));
   mswr::ComPtr<winfoundtn::IUriRuntimeClass> uri;
   hr = uri_factory->CreateUri(logo_url.Get(), &uri);
   CheckHR(hr, "Failed to create URI");
@@ -192,7 +193,7 @@ void CreateTileOnStartScreen(const string16& tile_id,
 
 }  // namespace
 
-BOOL MetroIsPinnedToStartScreen(const string16& tile_id) {
+BOOL MetroIsPinnedToStartScreen(const base::string16& tile_id) {
   mswr::ComPtr<winui::StartScreen::ISecondaryTileStatics> tile_statics;
   HRESULT hr = winrt_utils::CreateActivationFactory(
       RuntimeClass_Windows_UI_StartScreen_SecondaryTile,
@@ -205,7 +206,7 @@ BOOL MetroIsPinnedToStartScreen(const string16& tile_id) {
   return exists;
 }
 
-void MetroUnPinFromStartScreen(const string16& tile_id,
+void MetroUnPinFromStartScreen(const base::string16& tile_id,
                                const MetroPinUmaResultCallback& callback) {
   globals.appview_msg_loop->PostTask(
       FROM_HERE, base::Bind(&DeleteTileFromStartScreen,
@@ -213,9 +214,9 @@ void MetroUnPinFromStartScreen(const string16& tile_id,
                             callback));
 }
 
-void MetroPinToStartScreen(const string16& tile_id,
-                           const string16& title,
-                           const string16& url,
+void MetroPinToStartScreen(const base::string16& tile_id,
+                           const base::string16& title,
+                           const base::string16& url,
                            const base::FilePath& logo_path,
                            const MetroPinUmaResultCallback& callback) {
   globals.appview_msg_loop->PostTask(