Fix nits in TouchSelectionControllerClientAura

TouchSelectionControllerClientAura should include set, also removing an
unnecessary semicolon.

Bug: None
Test: Build.
Change-Id: Ie12084e61cce65a71fcdd6a7878cb3cbd0293270
Reviewed-on: https://chromium-review.googlesource.com/c/1297980Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Commit-Queue: David Jacobo <djacobo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602437}

content/browser/renderer_host/input/touch_selection_controller_client_aura.cc

@@ -4,6 +4,8 @@
 
 #include "content/browser/renderer_host/input/touch_selection_controller_client_aura.h"
 
+#include <set>
+
 #include "base/macros.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
@@ -390,7 +392,7 @@ void TouchSelectionControllerClientAura::OnSelectionEvent(
       quick_menu_requested_ = !quick_menu_requested_;
       UpdateQuickMenu();
       break;
-  };
+  }
 }
 
 void TouchSelectionControllerClientAura::InternalClient::OnSelectionEvent(