webapps: add splashscreen for installed webapps

chrome/android/java/res/values/dimens.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- 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. -->
 
 <resources>
     <!-- Connection info popup dimensions -->
     <dimen name="connection_info_padding_wide">24dp</dimen>
     <dimen name="connection_info_padding_thin">16dp</dimen>
 
@@ skipping 178 matching lines @@
     <dimen name="find_result_bar_vertical_padding">8px</dimen>
     <dimen name="find_result_bar_min_gap_between_stacks">3px</dimen>
     <dimen name="find_result_bar_stacked_result_height">3px</dimen>
     <dimen name="find_in_page_separator_width">1dp</dimen>
     <dimen name="find_in_page_popup_width">375dp</dimen>
     <dimen name="find_in_page_popup_height">60dp</dimen>
     <dimen name="find_in_page_popup_margin_end">62dp</dimen>
 
     <!-- Web app dimensions -->
     <dimen name="webapp_splash_image_size">128dp</dimen>
+    <dimen name="webapp_splash_title_bottom_margin">64dp</dimen>

[newt (away), 2015/09/04 18:45:48]

Likewise, I'd just inline these values rather than defining them in dimens.xml.
Since they're not going to be used anywhere else, putting them here just adds
unnecessary indirection. (i.e. it makes the code harder to read, and provides no
benefit)

[Lalit Maganti, 2015/09/04 19:12:02]

Done.

+    <dimen name="webapp_splash_title_size">24sp</dimen>
 
     <!-- Toolbar dimensions -->
     <dimen name="toolbar_tab_count_text_size_1_digit">12dp</dimen>
     <dimen name="toolbar_tab_count_text_size_2_digit">10dp</dimen>
     <dimen name="toolbar_height_no_shadow">56dp</dimen>
 
     <dimen name="location_bar_margin_top">5dp</dimen>
     <dimen name="location_bar_margin_bottom">5dp</dimen>
 
     <dimen name="toolbar_edge_padding">8dp</dimen>
@@ skipping 82 matching lines @@
     <dimen name="menu_footer_height">28dp</dimen>
 
     <!-- Favicon dimensions -->
     <dimen name="default_favicon_size">16dp</dimen>
 
     <!-- Media UI dimensions -->
     <!-- The media_session_icon_size is just big enough to make sure Android doesn't discard the
          icon but otherwise, the icon is meant to be a flat color so it doesn't really matter. -->
     <dimen name="media_session_icon_size">48dp</dimen>
 </resources>