Fix cyclic dependency between ProfilePolicyConnector and PrefService.

chrome/browser/chromeos/policy/policy_cert_verifier.h

Index: chrome/browser/chromeos/policy/policy_cert_verifier.h
diff --git a/chrome/browser/chromeos/policy/policy_cert_verifier.h b/chrome/browser/chromeos/policy/policy_cert_verifier.h
index c671161b3cc2661c04c787693bc709602bd3c7a2..9d11fec8e513b3c5ed232230c3197b4349625daa 100644
--- a/chrome/browser/chromeos/policy/policy_cert_verifier.h
+++ b/chrome/browser/chromeos/policy/policy_cert_verifier.h
@@ -12,10 +12,12 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "net/base/completion_callback.h"
 #include "net/cert/cert_trust_anchor_provider.h"
 #include "net/cert/cert_verifier.h"
 
 namespace net {
+class CertVerifyResult;
 class X509Certificate;
 typedef std::vector<scoped_refptr<X509Certificate> > CertificateList;
 }
@@ -27,15 +29,18 @@ namespace policy {
 class PolicyCertVerifier : public net::CertVerifier,
                            public net::CertTrustAnchorProvider {
  public:
-  // This object must be created on the UI thread. It's member functions and
-  // destructor must be called on the IO thread. |anchor_used_callback| is
-  // called on the IO thread everytime a certificate from the additional trust
-  // anchors (set with SetTrustAnchors) is used.
+  // Except for tests, PolicyCertVerifier should only be created by
+  // NetworkPolicyService, which is the counterpart of this class on the UI
+  // thread. Except of the constructor, all methods and the destructor must be
+  // called on the IO thread. Calls |anchor_used_callback| on the IO thread
+  // everytime a certificate from the additional trust anchors (set with
+  // SetTrustAnchors) is used.
   explicit PolicyCertVerifier(const base::Closure& anchor_used_callback);
   virtual ~PolicyCertVerifier();
 
   void InitializeOnIOThread();
 
+  // Sets the additional trust anchors.
   void SetTrustAnchors(const net::CertificateList& trust_anchors);
 
   // CertVerifier: