[rAc OSX] Factor out AutofillHeader class to contain dialog header elements.

chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h

Index: chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
diff --git a/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h b/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
index 4bbe157f3568b29333581f4e493517aa6079a01f..a15370de7da7438d8dba8cdee2996c0132320632 100644
--- a/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
+++ b/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
@@ -23,8 +23,8 @@ namespace autofill {
   class AutofillDialogViewDelegate;
 }
 
-@class AutofillAccountChooser;
 @class AutofillDialogWindowController;
+@class AutofillHeader;
 @class AutofillMainContainer;
 @class AutofillOverlayController;
 @class AutofillSignInContainer;
@@ -110,20 +110,19 @@ class AutofillDialogCocoa : public AutofillDialogView,
     NSWindowController<NSWindowDelegate, AutofillLayout> {
  @private
   content::WebContents* webContents_;  // weak.
-  autofill::AutofillDialogCocoa* autofillDialog_;  // weak.
+  autofill::AutofillDialogCocoa* dialog_;  // weak.
 
+  base::scoped_nsobject<AutofillHeader> header_;
   base::scoped_nsobject<AutofillMainContainer> mainContainer_;
   base::scoped_nsobject<AutofillSignInContainer> signInContainer_;
-  base::scoped_nsobject<AutofillAccountChooser> accountChooser_;
   base::scoped_nsobject<AutofillOverlayController> overlayController_;
   base::scoped_nsobject<NSTextField> loadingShieldTextField_;
-  base::scoped_nsobject<NSTextField> titleTextField_;
   base::scoped_nsobject<NSTextView> fieldEditor_;
 }
 
 // Designated initializer. The WebContents cannot be NULL.
 - (id)initWithWebContents:(content::WebContents*)webContents
-           autofillDialog:(autofill::AutofillDialogCocoa*)autofillDialog;
+                   dialog:(autofill::AutofillDialogCocoa*)dialog;
 
 // A child view request re-layouting.
 - (void)requestRelayout;