Fix GCC build for target 'all'

chrome/browser/ui/views/webshare/webshare_target_picker_view.h

Index: chrome/browser/ui/views/webshare/webshare_target_picker_view.h
diff --git a/chrome/browser/ui/views/webshare/webshare_target_picker_view.h b/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
index 18464cf3759ff000f7ab2fbe7c0ef92490f669cd..6e4db2ea5bc858c5ac6b87a1bca55ecab16c2cec 100644
--- a/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
+++ b/chrome/browser/ui/views/webshare/webshare_target_picker_view.h
@@ -17,15 +17,12 @@
 
 class GURL;
 class TargetPickerTableModel;
+class WebShareTargetPickerViewTest;
 
 namespace views {
 class TableView;
 }
 
-namespace {
-class WebShareTargetPickerViewTest;
-}
-
 // Dialog that presents the user with a list of share target apps. Allows the
 // user to pick one target to be opened and have data passed to it.
 //