Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal/app_modal_dialog_queue.h

Index: components/app_modal/app_modal_dialog_queue.h
diff --git a/components/app_modal/app_modal_dialog_queue.h b/components/app_modal/app_modal_dialog_queue.h
index d1f0491e42207883a94f05d4bd9ede494a4fa6c2..9fbf143d0b91991b2cdaa5a783cdadda5cdba309 100644
--- a/components/app_modal/app_modal_dialog_queue.h
+++ b/components/app_modal/app_modal_dialog_queue.h
@@ -9,10 +9,12 @@
 
 #include "base/basictypes.h"
 
-class AppModalDialog;
-
 template <typename T> struct DefaultSingletonTraits;
 
+namespace app_modal {
+
+class AppModalDialog;
+
 // Keeps a queue of AppModalDialogs, making sure only one app modal
 // dialog is shown at a time.
 // This class is a singleton.
@@ -86,4 +88,6 @@ class AppModalDialogQueue {
   DISALLOW_COPY_AND_ASSIGN(AppModalDialogQueue);
 };
 
+}  // namespace app_modal
+
 #endif  // COMPONENTS_APP_MODAL_APP_MODAL_DIALOG_QUEUE_H_