Improve documentation for special-purpose policy providers.

components/policy/core/common/BUILD.gn

Index: components/policy/core/common/BUILD.gn
diff --git a/components/policy/core/common/BUILD.gn b/components/policy/core/common/BUILD.gn
index da7cb0db5697b09ffca21a6633523e5fa4f23698..ba49b1132dd800077a5db4a94d43e365cda3a8ac 100644
--- a/components/policy/core/common/BUILD.gn
+++ b/components/policy/core/common/BUILD.gn
@@ -70,23 +70,22 @@ source_set("common") {
       "configuration_policy_provider.cc",
       "configuration_policy_provider.h",
       "external_data_fetcher.cc",
+      "../../policy_export.h",

[Andrew T Wilson (Slow), 2014/12/05 15:21:04]

Why is this moved here?

[Mattias Nissler (ping if slow), 2014/12/05 15:24:49]

Automated sort didn't sort. Reverted.

       "external_data_fetcher.h",
       "external_data_manager.h",
-      "forwarding_policy_provider.cc",
-      "forwarding_policy_provider.h",
       "mac_util.cc",
       "mac_util.h",
       "policy_bundle.cc",
       "policy_bundle.h",
       "policy_details.h",
+      "policy_load_status.cc",
+      "policy_load_status.h",
       "policy_loader_ios.h",
       "policy_loader_ios.mm",
       "policy_loader_mac.cc",
       "policy_loader_mac.h",
       "policy_loader_win.cc",
       "policy_loader_win.h",
-      "policy_load_status.cc",
-      "policy_load_status.h",
       "policy_map.cc",
       "policy_map.h",
       "policy_namespace.cc",
@@ -118,7 +117,8 @@ source_set("common") {
       "schema_map.h",
       "schema_registry.cc",
       "schema_registry.h",
-      "../../policy_export.h",
+      "schema_registry_tracking_policy_provider.cc",
+      "schema_registry_tracking_policy_provider.h",
     ]
 
     deps = [