Move PolicyMap and its dependencies to components/policy/.

This facilitates the refactoring of chrome/browser/policy into a layered
component.

BUG=271392

Review URL: https://codereview.chromium.org/78763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236575 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/policy_handlers.cc b/chrome/browser/extensions/policy_handlers.cc
index 5b80cc35..b424866 100644
--- a/chrome/browser/extensions/policy_handlers.cc
+++ b/chrome/browser/extensions/policy_handlers.cc
@@ -8,8 +8,8 @@
 #include "base/prefs/pref_value_map.h"
 #include "chrome/browser/extensions/external_policy_loader.h"
 #include "chrome/browser/policy/policy_error_map.h"
-#include "chrome/browser/policy/policy_map.h"
 #include "chrome/common/pref_names.h"
+#include "components/policy/core/common/policy_map.h"
 #include "extensions/common/extension.h"
 #include "grit/generated_resources.h"
 #include "policy/policy_constants.h"