Add source column to chrome://policy showing the origins of policies.

components/policy/core/common/async_policy_loader.h

Index: components/policy/core/common/async_policy_loader.h
diff --git a/components/policy/core/common/async_policy_loader.h b/components/policy/core/common/async_policy_loader.h
index 16437a87f2ce3543e115351ea33e46be856e5375..047b9106cdc9ab7c6e19115c52d0fa87098b4505 100644
--- a/components/policy/core/common/async_policy_loader.h
+++ b/components/policy/core/common/async_policy_loader.h
@@ -10,6 +10,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
+#include "components/policy/core/common/policy_types.h"

[Thiemo Nagel, 2015/09/01 17:40:36]

Don't include header files when it can be prevented by a forward declaration.

[fhorschig, 2015/09/04 06:53:53]

Done.

 #include "components/policy/core/common/schema_map.h"
 #include "components/policy/policy_export.h"
 
@@ -49,6 +50,9 @@ class POLICY_EXPORT AsyncPolicyLoader {
   // thread (e.g. setup file watchers).
   virtual void InitOnBackgroundThread() = 0;
 
+  // Provides the source of the policies for providers.
+  virtual PolicySource source() const = 0;

[Thiemo Nagel, 2015/09/01 17:40:36]

Please add a source_ member and make this a non-abstract member function.

[fhorschig, 2015/09/04 06:53:54]

Done. (Not even necessary. Loaders are always of platform type.)

+
   // Implementations should return the time of the last modification detected,
   // or base::Time() if it doesn't apply, which is the default.
   virtual base::Time LastModificationTime();