Do not show tab title when it is not needed

chrome/browser/android/compositor/layer/tab_layer.h

 // Copyright 2014 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_ANDROID_COMPOSITOR_LAYER_TAB_LAYER_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_TAB_LAYER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 69 matching lines @@
                      float static_to_view_blend,
                      float content_width,
                      float content_height,
                      float view_width,
                      float view_height,
                      bool show_toolbar,
                      int default_theme_color,
                      int toolbar_background_color,
                      int close_button_color,
                      bool anonymize_toolbar,
+                     bool show_tab_title,
                      int toolbar_textbox_resource_id,
                      int toolbar_textbox_background_color,
                      float toolbar_textbox_alpha,
                      float toolbar_alpha,
                      float toolbar_y_offset,
                      float side_border_scale,
                      bool inset_border);
 
   bool is_incognito() const { return incognito_; }
 
@@ skipping 42 matching lines @@
   scoped_refptr<cc::NinePatchLayer> shadow_;
   scoped_refptr<cc::UIResourceLayer> back_logo_;
   float brightness_;
 
   DISALLOW_COPY_AND_ASSIGN(TabLayer);
 };
 
 }  //  namespace android
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_TAB_LAYER_H_