ui: Remove unused DialogModel::GetDialogLabel().

BUG=none
R=kelvinp@chromium.org

Review URL: https://codereview.chromium.org/694363002

Cr-Commit-Position: refs/heads/master@{#302514}

ui/base/models/dialog_model.h

@@ -12,15 +12,12 @@
 namespace ui {
 
 // A model representing a dialog window. The model provides the content to show
-// to the user (i.e. label, title), and the ways the user can interact with it
+// to the user (i.e. title), and the ways the user can interact with it
 // (i.e. the buttons).
 class UI_BASE_EXPORT DialogModel {
  public:
   virtual ~DialogModel();
 
-  // Returns the text of show in the dialog.
-  virtual base::string16 GetDialogLabel() const = 0;
-
   // Returns the title of the dialog.
   virtual base::string16 GetDialogTitle() const = 0;
 

ui/views/window/dialog_delegate.cc

@@ -106,10 +106,6 @@ bool DialogDelegate::Close() {
   return Accept(true);
 }
 
-base::string16 DialogDelegate::GetDialogLabel() const {
-  return base::string16();
-}
-
 base::string16 DialogDelegate::GetDialogTitle() const {
   return GetWindowTitle();
 }

ui/views/window/dialog_delegate.h

@@ -83,7 +83,6 @@ class VIEWS_EXPORT DialogDelegate : public ui::DialogModel,
   virtual bool Close();
 
   // Overridden from ui::DialogModel:
-  base::string16 GetDialogLabel() const override;
   base::string16 GetDialogTitle() const override;
   int GetDialogButtons() const override;
   int GetDefaultDialogButton() const override;