Draggable region support for frameless app window on Windows.

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 5495984f6e37d4fad8c76c156bedfb64c139c1d5..bffed2f1f5141141788ae2904f0f6f08793f7cab 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -44,6 +44,7 @@ class ListValue;
 }
 
 namespace content {
+struct DraggableRegion;
 class TestRenderViewHost;
 class PowerSaveBlocker;
 }
@@ -545,6 +546,8 @@ class CONTENT_EXPORT RenderViewHostImpl
   void OnRunFileChooser(const FileChooserParams& params);
   void OnDomOperationResponse(const std::string& json_string,
                               int automation_id);
+  void OnUpdateDraggableRegions(
+      const std::vector<content::DraggableRegion>& regions);
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   void OnMsgShowPopup(const ViewHostMsg_ShowPopup_Params& params);