Add the Copresence API.

chrome/chrome_browser_extensions.gypi

Index: chrome/chrome_browser_extensions.gypi
diff --git a/chrome/chrome_browser_extensions.gypi b/chrome/chrome_browser_extensions.gypi
index 58098be537dd4eb8b50350e02c8706b85187c335..620e40a6e9b5e0aaec3e8c5f1087b18cc683357d 100644
--- a/chrome/chrome_browser_extensions.gypi
+++ b/chrome/chrome_browser_extensions.gypi
@@ -485,6 +485,10 @@
       'browser/extensions/api/cookies/cookies_api_constants.h',
       'browser/extensions/api/cookies/cookies_helpers.cc',
       'browser/extensions/api/cookies/cookies_helpers.h',
+      'browser/extensions/api/copresence/copresence_api.cc',
+      'browser/extensions/api/copresence/copresence_api.h',
+      'browser/extensions/api/copresence/copresence_translations.cc',
+      'browser/extensions/api/copresence/copresence_translations.h',
       'browser/extensions/api/copresence_private/copresence_private_api.cc',
       'browser/extensions/api/copresence_private/copresence_private_api.h',
       'browser/extensions/api/debugger/debugger_api.cc',
@@ -981,6 +985,7 @@
         'safe_browsing_proto',
         'sync_file_system_proto',
         '../third_party/re2/re2.gyp:re2',
+        '../components/components.gyp:copresence',

[brettw, 2014/08/20 17:03:23]

This updated the GYP build but didn't update the GN build. The build works if
the copresence proto happens to be built before this target (which I guess is
the case on the bots, at least for the incremental builds they do) but is not
the case necessarily and this fails on some systems.

If you add dependencies, please be sure to look for the corresponding thing in
the GN build. I'll fix this in a patch I'm working on.

[Charlie, 2014/08/20 17:22:53]

Sorry about that. Looks like the GN build does fail on my machine. I'll try to
check it more regularly, although we really should get the incremental builds to
fail in cases like these.

         '../components/components.gyp:omaha_query_params',
         '../components/components.gyp:onc_component',
         '../components/components.gyp:url_matcher',
@@ -1190,6 +1195,9 @@
           'sources': [
             '<@(chrome_browser_extensions_android_sources)',
           ],
+          'dependencies!': [
+            '../components/components.gyp:copresence',
+          ],
         }],
         ['enable_app_list==1', {
           'sources': [