Add recommended extension installation support

extensions/browser/test_management_policy.h

Index: extensions/browser/test_management_policy.h
diff --git a/extensions/browser/test_management_policy.h b/extensions/browser/test_management_policy.h
index a9951c7fa9663c0697f56e7a85d95f0751d7738f..fd8d8f62ba073b8d2a4c0241009e0cc418bcc34a 100644
--- a/extensions/browser/test_management_policy.h
+++ b/extensions/browser/test_management_policy.h
@@ -21,7 +21,8 @@ class TestManagementPolicyProvider : public ManagementPolicy::Provider {
     PROHIBIT_LOAD = 1 << 0,
     PROHIBIT_MODIFY_STATUS = 1 << 1,
     MUST_REMAIN_ENABLED = 1 << 2,
-    MUST_REMAIN_DISABLED = 1 << 3
+    MUST_REMAIN_DISABLED = 1 << 3,
+    MUST_REMAIN_INSTALLED = 1 << 4

[Finnur, 2014/10/06 14:01:42]

nit: Add a trailing comma, so that the next time we add a value it doesn't have
to change line 25 (less churn).

[binjin, 2014/10/06 18:48:48]

Done.

   };
 
   static std::string expected_error() {
@@ -49,11 +50,15 @@ class TestManagementPolicyProvider : public ManagementPolicy::Provider {
                                   Extension::DisableReason* reason,
                                   base::string16* error) const override;
 
+  virtual bool MustRemainInstalled(const Extension* extension,
+                                   base::string16* error) const OVERRIDE;
+
  private:
   bool may_load_;
   bool may_modify_status_;
   bool must_remain_enabled_;
   bool must_remain_disabled_;
+  bool must_remain_installed_;
   Extension::DisableReason disable_reason_;
 
   base::string16 error_message_;