Suppress ET_MOUSE_MOVE when the mouse hasn't moved on Windows.

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 540 matching lines @@
   bool legacy_window_destroyed_;
 
   // Contains a copy of the last context menu request parameters. Only set when
   // we receive a request to show the context menu on a long press.
   std::unique_ptr<ContextMenuParams> last_context_menu_params_;
 
   // Set to true if we requested the on screen keyboard to be displayed.
   bool virtual_keyboard_requested_;
 
   std::unique_ptr<ui::OnScreenKeyboardObserver> keyboard_observer_;
+
+  gfx::Point last_mouse_move_location_;
 #endif
 
   bool has_snapped_to_boundary_;
 
   // The last scroll offset of the view.
   gfx::Vector2dF last_scroll_offset_;
 
   gfx::Insets insets_;
 
   std::vector<ui::LatencyInfo> software_latency_info_;
@@ skipping 16 matching lines @@
   std::unique_ptr<RenderWidgetHostViewEventHandler> event_handler_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_