Don't pass NCMOUSEMOVE to RenderWidgetHostViewAura

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 038370b0e475e20dd98ea4f4bc1346f3b4ce7b0d..79320896c0f7581ed274d9cff4aa426ea5936ef6 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -136,11 +136,12 @@ bool CanRendererHandleEvent(const ui::MouseEvent* event) {
     return false;
 
 #if defined(OS_WIN)
-  // Renderer cannot handle WM_XBUTTON events.
+  // Renderer cannot handle WM_XBUTTON or NC events.
   switch (event->native_event().message) {
     case WM_XBUTTONDOWN:
     case WM_XBUTTONUP:
     case WM_XBUTTONDBLCLK:
+    case WM_NCMOUSEMOVE:
     case WM_NCXBUTTONDOWN:
     case WM_NCXBUTTONUP:
     case WM_NCXBUTTONDBLCLK: