Cleanup the policy code after the recent moves into the component.

components/policy/core/common/policy_service_impl.h

Index: components/policy/core/common/policy_service_impl.h
diff --git a/components/policy/core/common/policy_service_impl.h b/components/policy/core/common/policy_service_impl.h
index a10e881a2b0fd49d1e599f356b10511fa77ce042..1a67a419398728966702b1cd72aaf3d43bc5e878 100644
--- a/components/policy/core/common/policy_service_impl.h
+++ b/components/policy/core/common/policy_service_impl.h
@@ -28,15 +28,12 @@ class POLICY_EXPORT PolicyServiceImpl
       public ConfigurationPolicyProvider::Observer {
  public:
   typedef std::vector<ConfigurationPolicyProvider*> Providers;
-  typedef base::Callback<void(PolicyBundle*)> PreprocessCallback;
 
   // The PolicyServiceImpl will merge policies from |providers|. |providers|
   // must be sorted in decreasing order of priority; the first provider will
   // have the highest priority. The PolicyServiceImpl does not take ownership of
   // the providers, and they must outlive the PolicyServiceImpl.
-  // |preprocess_callback| will be applied every PolicyBundle before merginng.
-  PolicyServiceImpl(const Providers& providers,
-                    const PreprocessCallback& preprocess_callback);
+  explicit PolicyServiceImpl(const Providers& providers);
 
   virtual ~PolicyServiceImpl();
 
@@ -90,9 +87,6 @@ class POLICY_EXPORT PolicyServiceImpl
   // call to RefreshPolicies().
   std::set<ConfigurationPolicyProvider*> refresh_pending_;
 
-  // Callback invoked to manipulate a PolicyBundle before it is merged.
-  PreprocessCallback preprocess_callback_;
-
   // List of callbacks to invoke once all providers refresh after a
   // RefreshPolicies() call.
   std::vector<base::Closure> refresh_callbacks_;