Add initial device policy infrastructure.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index cfcf98aff7e094b8e32d843653a4ed6a9e318adb..7f8fadf3558453aa4843d10653f68f8a32ac281d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -668,10 +668,14 @@ const char kEnableTranslate[] = "translate.enabled";
 
 const char kPinnedTabs[] = "pinned_tabs";
 
-// Integer that specifies the policy refresh rate in milliseconds. Not all
-// values are meaningful, so it is clamped to a sane range by the policy
-// provider.
-const char kPolicyRefreshRate[] = "policy.refresh_rate";
+// Integer that specifies the policy refresh rate for user policy in
+// milliseconds. Not all values are meaningful, so it is clamped to a sane range
+// by the policy provider.
+const char kPolicyUserPolicyRefreshRate[] = "policy.user_policy_refresh_rate";
+
+// Same as |kPolicyUserPolicyRefreshRate|, but for device policy.
+const char kPolicyDevicePolicyRefreshRate[] =
+    "policy.device_policy_refresh_rate";
 
 // Integer containing the default Geolocation content setting.
 const char kGeolocationDefaultContentSetting[] =