[Sync] Fix namespaces for the sync_sessions component.

chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h

Index: chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h
diff --git a/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h b/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h
index 0fff9e7b3cf6923473ab333fd265ecf6a964c758..67b72ae3b6beecd333554c13bd2279b86ab39160 100644
--- a/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h
+++ b/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h
@@ -5,6 +5,9 @@
 #ifndef CHROME_BROWSER_UI_SYNC_TAB_CONTENTS_SYNCED_TAB_DELEGATE_H_
 #define CHROME_BROWSER_UI_SYNC_TAB_CONTENTS_SYNCED_TAB_DELEGATE_H_
 
+#include <string>
+#include <vector>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/sessions/core/session_id.h"
@@ -16,7 +19,7 @@ class WebContents;
 }
 
 class TabContentsSyncedTabDelegate
-    : public browser_sync::SyncedTabDelegate,
+    : public sync_sessions::SyncedTabDelegate,
       public content::WebContentsUserData<TabContentsSyncedTabDelegate> {
  public:
   ~TabContentsSyncedTabDelegate() override;