Draggable region support for frameless app window on Windows.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 79ea7ab8605ef7f9dd485124e03e18e465cc277b..1b66fb94243fd4f8bbfecbc0e10267c96b688012 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -62,6 +62,7 @@
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_restriction.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/draggable_region.h"
 #include "content/public/common/url_constants.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_util.h"
@@ -1367,6 +1368,12 @@ void WebContentsImpl::RequestMediaAccessPermission(
     callback.Run(content::MediaStreamDevices());
 }
 
+void WebContentsImpl::UpdateDraggableRegions(
+    const std::vector<content::DraggableRegion>& regions) {
+  if (delegate_)
+    delegate_->UpdateDraggableRegions(regions);
+}
+
 void WebContentsImpl::UpdatePreferredSize(const gfx::Size& pref_size) {
   preferred_size_ = pref_size;
   if (delegate_)