Implemented a policy to match the ClearSiteDataOnExit pref.

chrome/browser/policy/configuration_policy_pref_store.cc

Index: chrome/browser/policy/configuration_policy_pref_store.cc
diff --git a/chrome/browser/policy/configuration_policy_pref_store.cc b/chrome/browser/policy/configuration_policy_pref_store.cc
index 9312a4dbd95db40f8938d279fdafd0f2ae82ed11..0b8445f928568756b03f47316d103ffb6e9865fd 100644
--- a/chrome/browser/policy/configuration_policy_pref_store.cc
+++ b/chrome/browser/policy/configuration_policy_pref_store.cc
@@ -193,6 +193,8 @@ const ConfigurationPolicyPrefKeeper::PolicyToPreferenceMapEntry
     prefs::kIncognitoEnabled },
   { Value::TYPE_BOOLEAN, kPolicySavingBrowserHistoryDisabled,
     prefs::kSavingBrowserHistoryDisabled },
+  { Value::TYPE_BOOLEAN, kPolicyClearSiteDataOnExit,
+    prefs::kClearSiteDataOnExit },
   { Value::TYPE_BOOLEAN, kPolicyDeveloperToolsDisabled,
     prefs::kDevToolsDisabled },
   { Value::TYPE_BOOLEAN, kPolicyBlockThirdPartyCookies,
@@ -830,6 +832,8 @@ ConfigurationPolicyPrefStore::GetChromePolicyDefinitionList() {
     { kPolicyIncognitoEnabled, Value::TYPE_BOOLEAN, key::kIncognitoEnabled },
     { kPolicySavingBrowserHistoryDisabled, Value::TYPE_BOOLEAN,
       key::kSavingBrowserHistoryDisabled },
+    { kPolicyClearSiteDataOnExit, Value::TYPE_BOOLEAN,
+      key::kClearSiteDataOnExit },
     { kPolicyDeveloperToolsDisabled, Value::TYPE_BOOLEAN,
       key::kDeveloperToolsDisabled },
     { kPolicyBlockThirdPartyCookies, Value::TYPE_BOOLEAN,