Fix missing backing store in Linux.

chrome/browser/tab_contents/web_contents_view_win.cc

Index: chrome/browser/tab_contents/web_contents_view_win.cc
diff --git a/chrome/browser/tab_contents/web_contents_view_win.cc b/chrome/browser/tab_contents/web_contents_view_win.cc
index 8b949c9c9154b10fc30b781c6d5b63f4ae813bc8..29f32b7ef025e0763faf11ee4233bd039b7a9692 100644
--- a/chrome/browser/tab_contents/web_contents_view_win.cc
+++ b/chrome/browser/tab_contents/web_contents_view_win.cc
@@ -295,6 +295,10 @@ void WebContentsViewWin::RestoreFocus() {
   }
 }
 
+void WebContentsViewWin::SetChildSize(RenderWidgetHostView* rwh_view) {
+  rwh_view->SetSize(GetContainerSize());
+}
+
 void WebContentsViewWin::UpdateDragCursor(bool is_drop_target) {
   drop_target_->set_is_drop_target(is_drop_target);
 }