[Refactor] Cache the views::Widget* that the FrameMaximizeButton acts on

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
index 36d387b9a4e2c73ed52d7752e9a5abb0b4379883..c2c39baae62fb1e5354cfb2247a14ae5be09fe6d 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
@@ -90,8 +90,8 @@ BrowserNonClientFrameViewAsh::~BrowserNonClientFrameViewAsh() {
 }
 
 void BrowserNonClientFrameViewAsh::Init() {
-  caption_button_container_ = new ash::FrameCaptionButtonContainerView(this,
-      frame(), ash::FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
+  caption_button_container_ = new ash::FrameCaptionButtonContainerView(frame(),
+      ash::FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
   AddChildView(caption_button_container_);
 
   // Initializing the TabIconView is expensive, so only do it if we need to.