Gracefully handle extremely small windows in tab-modal sign in flow.

chrome/browser/ui/views/profiles/signin_view_controller_delegate_views.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/profile_chooser_constants.h"
 #include "chrome/browser/ui/signin_view_controller_delegate.h"
@@ skipping 29 matching lines @@
       views::WebView* content_view,
       Browser* browser,
       bool wait_for_size);
 
   // Creates the web view that contains the signin flow in |mode| using
   // |profile| as the web content's profile, then sets |delegate| as the created
   // web content's delegate.
   static views::WebView* CreateGaiaWebView(
       content::WebContentsDelegate* delegate,
       profiles::BubbleViewMode mode,
-      Profile* profile,
+      Browser* browser,
       signin_metrics::AccessPoint access_point);
 
-  static views::WebView* CreateSyncConfirmationWebView(Profile* profile);
+  static views::WebView* CreateSyncConfirmationWebView(Browser* browser);
 
   // views::DialogDelegateView:
   views::View* GetContentsView() override;
   views::Widget* GetWidget() override;
   const views::Widget* GetWidget() const override;
   void DeleteDelegate() override;
   ui::ModalType GetModalType() const override;
   bool ShouldShowCloseButton() const override;
   int GetDialogButtons() const override;
 
@@ skipping 11 matching lines @@
   // wait_for_size_ stores whether the dialog should only be shown after its
   // content's size has been laid out and measured so that the constrained
   // window is sized to the content.
   bool wait_for_size_;
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninViewControllerDelegateViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_