Resize synchronization for Linux.

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

Index: chrome/browser/renderer_host/render_widget_host_view_gtk.cc
diff --git a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
index bbbe45605b8a62ff56d1e04c3601ad38d01c19c3..c701ba130f545741617cc1087c0ca2dff5caa268 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -1048,6 +1048,13 @@ bool RenderWidgetHostViewGtk::ContainsNativeView(
   return false;
 }
 
+void RenderWidgetHostViewGtk::GpuRenderingActivated(bool activated) {
+  GtkPreserveWindow* widget =
+    reinterpret_cast<GtkPreserveWindow*>(view_.get());
+
+  gtk_preserve_window_delegate_resize(widget, activated);
+}
+
 void RenderWidgetHostViewGtk::ForwardKeyboardEvent(
     const NativeWebKeyboardEvent& event) {
   if (!host_)