Enforce the 'requirements' field in manifests.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index f70bacb054d7ca1bb1269335e82dc0d0db109f7c..e47d3104516080435cca8c1008ac493a75738394 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -86,6 +86,7 @@ class ExtensionCookiesEventRouter;
 class ExtensionSyncData;
 class ExtensionSystem;
 class ExtensionUpdater;
+class RequirementsProvider;
 class SettingsFrontend;
 class WebNavigationEventRouter;
 }
@@ -350,6 +351,13 @@ class ExtensionService
   virtual void DisableExtension(const std::string& extension_id,
       extensions::Extension::DisableReason disable_reason);
 
+  // Called to report an extension that declares requirements that are not meet

[Aaron Boodman, 2012/07/22 17:46:25]

s/meet/met/

+  // by the system. An install warning will be added to the extension, and if
+  // |disable_extension| is true, the extension will be disabled.
+  void UnsupportedRequirements(const std::string& extension_id,
+                               const string16& error,
+                               bool disable_extension);
+
   // Updates the |extension|'s granted permissions lists to include all
   // permissions in the |extension|'s manifest and re-enables the
   // extension.
@@ -854,6 +862,9 @@ class ExtensionService
 
   scoped_ptr<ExtensionErrorUI> extension_error_ui_;
 
+  // The provider that checks if an extension is supported.
+  scoped_ptr<extensions::RequirementsProvider> requirements_provider_;
+
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,