Attempt at fixing crash. Because BrowserActionView lazily creates its

chrome/browser/ui/views/browser_action_view.cc

Index: chrome/browser/ui/views/browser_action_view.cc
diff --git a/chrome/browser/ui/views/browser_action_view.cc b/chrome/browser/ui/views/browser_action_view.cc
index 19f817a2be176cf0d0cc1f13d2be946c4fdf675c..5db3bad73e3ebcb48bf7cf6d2dd652029d6ad8d0 100644
--- a/chrome/browser/ui/views/browser_action_view.cc
+++ b/chrome/browser/ui/views/browser_action_view.cc
@@ -64,6 +64,10 @@ gfx::ImageSkia BrowserActionView::GetIconWithBadge() {
 }
 
 void BrowserActionView::Layout() {
+  // |button_| is NULL if Layout() is invoked before we have a valid widget.
+  if (!button_)
+    return;
+
   // We can't rely on button_->GetPreferredSize() here because that's not set
   // correctly until the first call to
   // BrowserActionsContainer::RefreshBrowserActionViews(), whereas this can be