Refactor the various ways to control what users can do to extensions.

chrome/browser/extensions/extension_system.cc

Index: chrome/browser/extensions/extension_system.cc
===================================================================
--- chrome/browser/extensions/extension_system.cc	(revision 140193)
+++ chrome/browser/extensions/extension_system.cc	(working copy)
@@ -26,6 +26,7 @@
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/lazy_background_task_queue.h"
+#include "chrome/browser/extensions/management_policy.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ -84,6 +85,11 @@
   extension_prefs_->Init(extensions_disabled);
 }
 
+void ExtensionSystemImpl::Shared::RegisterManagementPolicyProviders() {
+  DCHECK(extension_prefs_.get());
+  management_policy_->RegisterProvider(extension_prefs_.get());
+}
+
 void ExtensionSystemImpl::Shared::InitInfoMap() {
   // The ExtensionInfoMap needs to be created before the
   // ExtensionProcessManager.
@@ -120,6 +126,11 @@
       autoupdate_enabled,
       extensions_enabled));
 
+  // The ManagementPolicy providers msut be registered before the
+  // ExtensionService tries to load any extensions.
+  management_policy_.reset(new extensions::ManagementPolicy);
+  RegisterManagementPolicyProviders();
+
   extension_service_->component_loader()->AddDefaultComponentExtensions();
   if (command_line->HasSwitch(switches::kLoadComponentExtension)) {
     CommandLine::StringType path_list = command_line->GetSwitchValueNative(
@@ -189,6 +200,10 @@
   return extension_service_.get();
 }
 
+extensions::ManagementPolicy* ExtensionSystemImpl::Shared::management_policy() {
+  return management_policy_.get();
+}
+
 UserScriptMaster* ExtensionSystemImpl::Shared::user_script_master() {
   return user_script_master_.get();
 }
@@ -261,6 +276,10 @@
   return shared_->extension_service();
 }
 
+extensions::ManagementPolicy* ExtensionSystemImpl::management_policy() {
+  return shared_->management_policy();
+}
+
 UserScriptMaster* ExtensionSystemImpl::user_script_master() {
   return shared_->user_script_master();
 }