Force sizing of a new tab as soon as TabContents is created....

chrome/browser/browser.cc

 // Copyright (c) 2006-2009 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/browser.h"
 
 #include "app/animation.h"
 #include "app/l10n_util.h"
 #include "base/command_line.h"
 #include "base/idle_timer.h"
@@ skipping 1446 matching lines @@
   return TAB_TEAROFF_ACTION | (tab_count() > 1 ? TAB_MOVE_ACTION : 0);
 }
 
 TabContents* Browser::CreateTabContentsForURL(
     const GURL& url, const GURL& referrer, Profile* profile,
     PageTransition::Type transition, bool defer_load,
     SiteInstance* instance) const {
   TabContents* contents = new TabContents(profile, instance,
                                           MSG_ROUTING_NONE, NULL);
 
+  // Ensure that the new TabContentsView begins at the same size as the
+  // previous TabContentsView if it existed.  Otherwise, the initial WebKit
+  // layout will be performed based on a width of 0 pixels, causing a
+  // very long, narrow, inaccurate layout.  Because some scripts on pages (as
+  // well as WebKit's anchor link location calculation) are run on the initial
+  // layout and not recalculated later, we need to ensure the first layout is
+  // performed with sane view dimensions even when we're opening a new
+  // background tab.
+  if (TabContents* old_contents = tabstrip_model_.GetSelectedTabContents())
+    contents->view()->SizeContents(old_contents->view()->GetContainerSize());
+
   if (!defer_load) {
     // Load the initial URL before adding the new tab contents to the tab strip
     // so that the tab contents has navigation state.
     contents->controller().LoadURL(url, referrer, transition);
   }
 
   return contents;
 }
 
 bool Browser::CanDuplicateContentsAt(int index) {
@@ skipping 1299 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserToolbarModel (private):
 
 NavigationController* Browser::BrowserToolbarModel::GetNavigationController() {
   // This |current_tab| can be NULL during the initialization of the
   // toolbar during window creation (i.e. before any tabs have been added
   // to the window).
   TabContents* current_tab = browser_->GetSelectedTabContents();
   return current_tab ? &current_tab->controller() : NULL;
 }