Make browser process a singleton service

chrome/browser/browser_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/browser_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="browser_resources.pak" type="data_package" />
   </outputs>
   <release seq="1">
     <structures>
@@ skipping 607 matching lines @@
         <include name="IDR_CAST_FAVICON" file="resources\cast\cast_favicon.ico" type="BINDATA" />
       </if>
       <if expr="not is_android and not is_ios">
         <include name="IDR_IME_WINDOW_CLOSE" file="resources\input_ime\ime_window_close.png" type="BINDATA" />
         <include name="IDR_IME_WINDOW_CLOSE_C" file="resources\input_ime\ime_window_close_click.png" type="BINDATA" />
         <include name="IDR_IME_WINDOW_CLOSE_H" file="resources\input_ime\ime_window_close_hover.png" type="BINDATA" />
       </if>
       <include name="IDR_CHROME_CONTENT_BROWSER_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_browser_manifest_overlay.json" use_base_dir="false" type="BINDATA" />
       <include name="IDR_CHROME_CONTENT_GPU_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_gpu_manifest_overlay.json" type="BINDATA" use_base_dir="false" />
       <include name="IDR_CHROME_CONTENT_PLUGIN_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_plugin_manifest_overlay.json" type="BINDATA" use_base_dir="false" />
+      <include name="IDR_CHROME_CONTENT_PACKAGED_SERVICES_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_packaged_services_manifest_overlay.json" type="BINDATA" use_base_dir="false"/>

[sky, 2017/02/15 00:35:26]

Only include if enable_package_mash_services?

[Ken Rockot(use gerrit already), 2017/02/15 01:38:05]

Nope, this is used in and out of the mash environment. For example chrome
packages image_decoder and preferences services here in all environments.

       <include name="IDR_CHROME_CONTENT_RENDERER_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_renderer_manifest_overlay.json" type="BINDATA" use_base_dir="false" />
       <include name="IDR_CHROME_CONTENT_UTILITY_MANIFEST_OVERLAY" file="${root_gen_dir}\chrome\app\chrome_content_utility_manifest_overlay.json" type="BINDATA" use_base_dir="false" />
       <include name="IDR_NACL_LOADER_MANIFEST" file="../../components/nacl/loader/nacl_loader_manifest.json" type="BINDATA" />
       <if expr="is_win">
         <include name="IDR_NACL_BROKER_MANIFEST" file="../../components/nacl/broker/nacl_broker_manifest.json" type="BINDATA" />
       </if>
       <if expr="is_win">
         <include name="IDR_WELCOME_WIN10_DEFAULT_LARGE_WEBP" file="resources\welcome\win10\default-large.webp" type="BINDATA" />
         <include name="IDR_WELCOME_WIN10_DEFAULT_SMALL_WEBP" file="resources\welcome\win10\default-small.webp" type="BINDATA" />
         <include name="IDR_WELCOME_WIN10_PIN_LARGE_WEBP" file="resources\welcome\win10\pin-large.webp" type="BINDATA" />
         <include name="IDR_WELCOME_WIN10_PIN_SMALL_WEBP" file="resources\welcome\win10\pin-small.webp" type="BINDATA" />
       </if>
       <if expr="not is_android and not is_ios">
         <include name="IDR_SSL_ERROR_ASSISTANT_PB" file="${root_gen_dir}/chrome/browser/resources/ssl/ssl_error_assistant/ssl_error_assistant.pb" use_base_dir="false" type="BINDATA" />
       </if>
     </includes>
   </release>
 </grit>