Immersive mode reveals the tabstrip/omnibox on top of web content

chrome/browser/ui/views/tabs/tab_strip.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/views/tabs/tab_strip.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
@@ skipping 1138 matching lines @@
     if (previous_tab_bounds.right() + tab_h_offset() != tab_bounds.x()) {
       int x = previous_tab_bounds.right() - tab_bounds.x() -
           stacked_tab_right_clip();
       clip->SetRect(x, 0, tab_bounds.width() - x, tab_bounds.height());
     }
   }
   return true;
 }
 
 void TabStrip::SetImmersiveStyle(bool enable) {
+  if (immersive_style_ == enable)
+    return;
   immersive_style_ = enable;
   if (immersive_style_) {
     // Dominant colors are only updated automatically when the tab strip is
     // already using immersive style. Compute the initial values.
     for (int i = 0; i < tab_count(); ++i)
       tab_at(i)->UpdateIconDominantColor();
   }
 }
 
 bool TabStrip::IsImmersiveStyle() const {
@@ skipping 211 matching lines @@
       if (view)
         return view;
     }
     Tab* tab = FindTabForEvent(point);
     if (tab)
       return ConvertPointToViewAndGetEventHandler(this, tab, point);
   }
   return this;
 }
 
+// static
+int TabStrip::GetImmersiveHeight() {
+  return Tab::GetImmersiveHeight();
+}
+
 int TabStrip::GetMiniTabCount() const {
   int mini_count = 0;
   while (mini_count < tab_count() && tab_at(mini_count)->data().mini)
     mini_count++;
   return mini_count;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // TabStrip, views::ButtonListener implementation:
 
@@ skipping 1164 matching lines @@
   if (!adjust_layout_)
     return false;
 
 #if !defined(OS_CHROMEOS)
   if (ui::GetDisplayLayout() != ui::LAYOUT_TOUCH)
     return false;
 #endif
 
   return true;
 }