Use the window's bounds if available instead of restore bounds.

chrome/browser/ui/browser_tabrestore.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/browser_tabrestore.h"
 
 #include "apps/ui/web_contents_sizer.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
@@ skipping 104 matching lines @@
                                                   add_types);
   if (select) {
     browser->window()->Activate();
   } else {
     // We set the size of the view here, before Blink does its initial layout.
     // If we don't, the initial layout of background tabs will be performed
     // with a view width of 0, which may cause script outputs and anchor link
     // location calculations to be incorrect even after a new layout with
     // proper view dimensions. TabStripModel::AddWebContents() contains similar
     // logic.
-    apps::ResizeWebContents(web_contents,
-                            browser->window()->GetRestoredBounds().size());
+    gfx::Size size = browser->window()->GetBounds().size();
+    // Fallback to the restore bounds if it's empty as the window is not shown
+    // yet and the bounds may not be available on all platforms.
+    if (size.IsEmpty())
+      size = browser->window()->GetRestoredBounds().size();
+    apps::ResizeWebContents(web_contents, size);
     web_contents->WasHidden();
   }
   SessionService* session_service =
       SessionServiceFactory::GetForProfileIfExisting(browser->profile());
   if (session_service)
     session_service->TabRestored(web_contents, pin);
   return web_contents;
 }
 
 content::WebContents* ReplaceRestoredTab(
@@ skipping 19 matching lines @@
   int insertion_index = tab_strip->active_index();
   tab_strip->InsertWebContentsAt(insertion_index + 1,
                                  web_contents,
                                  TabStripModel::ADD_ACTIVE |
                                  TabStripModel::ADD_INHERIT_GROUP);
   tab_strip->CloseWebContentsAt(insertion_index, TabStripModel::CLOSE_NONE);
   return web_contents;
 }
 
 }  // namespace chrome