Move PolicyMap and its dependencies to components/policy/.

components/policy/core/common/external_data_fetcher.cc

Index: components/policy/core/common/external_data_fetcher.cc
diff --git a/chrome/browser/policy/external_data_fetcher.cc b/components/policy/core/common/external_data_fetcher.cc
similarity index 89%
rename from chrome/browser/policy/external_data_fetcher.cc
rename to components/policy/core/common/external_data_fetcher.cc
index c686c7a8be82c52f2368c46c3d141f7981a3429c..924dce6e68763509ed80874b27784dbc62ec31c2 100644
--- a/chrome/browser/policy/external_data_fetcher.cc
+++ b/components/policy/core/common/external_data_fetcher.cc
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/policy/external_data_fetcher.h"
+#include "components/policy/core/common/external_data_fetcher.h"
 
 #include "base/callback.h"
-#include "chrome/browser/policy/external_data_manager.h"
+#include "components/policy/core/common/external_data_manager.h"
 
 namespace policy {