Enforce the 'requirements' field in manifests.

chrome/browser/extensions/extension_prefs.h

Index: chrome/browser/extensions/extension_prefs.h
diff --git a/chrome/browser/extensions/extension_prefs.h b/chrome/browser/extensions/extension_prefs.h
index 70565fa95f8822c8b3f26ac17c9ad31b6136cfd5..90630749f693ae94f124c1ba161cb69dd3832134 100644
--- a/chrome/browser/extensions/extension_prefs.h
+++ b/chrome/browser/extensions/extension_prefs.h
@@ -147,6 +147,18 @@ class ExtensionPrefs : public ContentSettingsStore::Observer,
       const Extension* extension,
       bool did_escalate);
 
+  // Does the extension declare requirements that the system does not meet?
+  bool HasUnsupportedRequirements(const std::string& extension_id);
+
+  // Remove any unsupported requirement warnings that this extension has.
+  void ClearUnsupportedRequirements(const std::string& extension_id);
+
+  void SetUnsupportedRequirements(const std::string& extension_id,
+                                  std::vector<std::string> requirement_errors);
+
+  std::vector<std::string> GetUnsupportedRequirements(
+      const std::string& extension_id);
+
   // Getter and setters for disabled reason.
   Extension::DisableReason GetDisableReason(
       const std::string& extension_id);
@@ -456,6 +468,10 @@ class ExtensionPrefs : public ContentSettingsStore::Observer,
   virtual void UpdateExtensionPref(const std::string& id,
                                    const std::string& key,
                                    base::Value* value) OVERRIDE;
+  virtual void UpdateExtensionPrefList(const std::string& id,
+                                       const std::string& key,
+                                       const std::vector<std::string>& value)
+                                       OVERRIDE;
   virtual void DeleteExtensionPrefs(const std::string& id) OVERRIDE;
   virtual bool ReadExtensionPrefBoolean(
       const std::string& extension_id,
@@ -467,6 +483,10 @@ class ExtensionPrefs : public ContentSettingsStore::Observer,
       const std::string& extension_id,
       const std::string& pref_key,
       const base::ListValue** out_value) const OVERRIDE;
+  virtual bool ReadExtensionPrefStringList(
+      const std::string& extension_id,
+      const std::string& pref_key,
+      std::vector<std::string>* out_value) const OVERRIDE;
   virtual bool ReadExtensionPrefString(const std::string& extension_id,
                                        const std::string& pref_key,
                                        std::string* out_value) const OVERRIDE;