Request to start/stop calculating composition info from RenderWidget when it is active/inactive.

content/browser/renderer_host/render_widget_host_view_aura.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 669 matching lines @@
   // the current view has focus. Defaults to false.
   bool set_focus_on_mouse_down_or_key_event_;
 
   float device_scale_factor_;
 
   // Allows tests to send gesture events for testing without first sending a
   // corresponding touch sequence, as would be required by
   // RenderWidgetHostInputEventRouter.
   bool disable_input_event_router_for_testing_;
 
+  // The routing and process IDs for the last RenderWidgetHost which had a
+  // TextInputState of non-NONE.
+  int32_t last_active_widget_process_id_;
+  int32_t last_active_widget_routing_id_;
+
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_