Update uses of Value in chromeos/, cloud_print/, components/, content/ to use the base:: namespace.

components/policy/core/common/policy_service.h

Index: components/policy/core/common/policy_service.h
diff --git a/components/policy/core/common/policy_service.h b/components/policy/core/common/policy_service.h
index 4293e5c363ade7b2d6cd80c1c94d8f931b472432..dbc09ae684ead39095fe971c08471a4cce1e5b3b 100644
--- a/components/policy/core/common/policy_service.h
+++ b/components/policy/core/common/policy_service.h
@@ -78,7 +78,8 @@ class POLICY_EXPORT PolicyService {
 // PolicyMap for the given policy namespace.
 class POLICY_EXPORT PolicyChangeRegistrar : public PolicyService::Observer {
  public:
-  typedef base::Callback<void(const Value*, const Value*)> UpdateCallback;
+  typedef base::Callback<void(const base::Value*,
+                              const base::Value*)> UpdateCallback;
 
   // Observes updates to the given (domain, component_id) namespace in the given
   // |policy_service|, and notifies |observer| whenever any of the registered