Create a about handler component.

components/about_handler.gypi

Index: components/about_handler.gypi
diff --git a/components/browsing_data.gypi b/components/about_handler.gypi
similarity index 61%
copy from components/browsing_data.gypi
copy to components/about_handler.gypi
index c13a84a035868ba6caa6c5d5c06a370c6099332a..fce5b8c8b5561e6b47ddad17c89ad03d09ccb64a 100644
--- a/components/browsing_data.gypi
+++ b/components/about_handler.gypi
@@ -5,11 +5,11 @@
 {
   'targets': [
     {
-      'target_name': 'browsing_data',
+      # GN version: //components/about_handler
+      'target_name': 'about_handler',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
-        '../content/content.gyp:content_browser',
         '../net/net.gyp:net',
       ],
       'include_dirs': [
@@ -17,8 +17,10 @@
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
-        'browsing_data/storage_partition_http_cache_data_remover.cc',
-        'browsing_data/storage_partition_http_cache_data_remover.h',
+        'about_handler/about_protocol_handler.cc',
+        'about_handler/about_protocol_handler.h',
+        'about_handler/url_request_about_job.cc',
+        'about_handler/url_request_about_job.h',
       ],
     },
   ],