Removed unused TrayItemMore::ReplaceIcon().

BUG=None

Review-Url: https://codereview.chromium.org/2233963002
Cr-Commit-Position: refs/heads/master@{#418974}

ash/common/system/tray/tray_item_more.cc

@@ -23,9 +23,9 @@ namespace ash {
 TrayItemMore::TrayItemMore(SystemTrayItem* owner, bool show_more)
     : owner_(owner),
       show_more_(show_more),
-      icon_(NULL),
-      label_(NULL),
-      more_(NULL) {
+      icon_(nullptr),
+      label_(nullptr),
+      more_(nullptr) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
                                         kTrayPopupPaddingHorizontal, 0,
                                         kTrayPopupPaddingBetweenItems));
@@ -69,12 +69,6 @@ void TrayItemMore::SetAccessibleName(const base::string16& name) {
   accessible_name_ = name;
 }
 
-void TrayItemMore::ReplaceIcon(views::View* view) {
-  delete icon_;
-  icon_ = NULL;
-  AddChildViewAt(view, 0);
-}
-
 bool TrayItemMore::PerformAction(const ui::Event& event) {
   if (!show_more_)
     return false;

ash/common/system/tray/tray_item_more.h

@@ -31,12 +31,6 @@ class TrayItemMore : public ActionableView {
   void SetImage(const gfx::ImageSkia& image_skia);
   void SetAccessibleName(const base::string16& name);
 
- protected:
-  // Replaces the default icon (on the left of the label), and allows a custom
-  // view to be placed there. Once the default icon is replaced, |SetImage|
-  // should never be called.
-  void ReplaceIcon(views::View* view);
-
  private:
   // Overridden from ActionableView.
   bool PerformAction(const ui::Event& event) override;