Cosmetic cleanups in chrome/browser/policy/

chrome/browser/policy/user_policy_cache.h

Index: chrome/browser/policy/user_policy_cache.h
diff --git a/chrome/browser/policy/user_policy_cache.h b/chrome/browser/policy/user_policy_cache.h
index f60c82dbcfbdd8b16fa173bfb7c83aecf7267ed1..a065e193a5a4b8d710f636f0f249b1998e4db503 100644
--- a/chrome/browser/policy/user_policy_cache.h
+++ b/chrome/browser/policy/user_policy_cache.h
@@ -8,23 +8,29 @@
 
 #include <string>
 
-#include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/values.h"
 #include "chrome/browser/policy/cloud_policy_cache_base.h"
 #include "chrome/browser/policy/user_policy_disk_cache.h"
 
-namespace em = enterprise_management;
+class FilePath;
 
 namespace enterprise_management {
+
 class CachedCloudPolicyResponse;
 // <Old-style policy support> (see comment below)
 class GenericValue;
 // </Old-style policy support>
+
 }  // namespace enterprise_management
 
 namespace policy {
 
+namespace em = enterprise_management;
+
+class PolicyMap;
+
 // CloudPolicyCacheBase implementation that persists policy information
 // into the file specified by the c'tor parameter |backing_file_path|.
 class UserPolicyCache : public CloudPolicyCacheBase,