Lazily load extension API schemas

chrome/common/extensions/features/simple_feature.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_
 #define CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 36 matching lines @@
     min_manifest_version_ = min_manifest_version;
   }
 
   int max_manifest_version() const { return max_manifest_version_; }
   void set_max_manifest_version(int max_manifest_version) {
     max_manifest_version_ = max_manifest_version;
   }
 
   Availability IsAvailableToContext(const Extension* extension,
                                     Context context) const {
-    return IsAvailableToContext(extension, context, GetCurrentPlatform());
+    return IsAvailableToContext(extension, context, GURL());
+  }
+  Availability IsAvailableToContext(const Extension* extension,
+                                    Context context,
+                                    Platform platform) const {
+    return IsAvailableToContext(extension, context, GURL(), platform);
+  }
+  Availability IsAvailableToContext(const Extension* extension,
+                                    Context context,
+                                    const GURL& url) const {
+    return IsAvailableToContext(extension, context, url, GetCurrentPlatform());
   }
 
   // extension::Feature:
   virtual Availability IsAvailableToManifest(const std::string& extension_id,
                                              Manifest::Type type,
                                              Location location,
                                              int manifest_version,
                                              Platform platform) const OVERRIDE;
 
   virtual Availability IsAvailableToContext(const Extension* extension,
                                             Context context,
+                                            const GURL& url,
                                             Platform platform) const OVERRIDE;
 
-  virtual std::string GetAvailabilityMessage(
-      AvailabilityResult result, Manifest::Type type) const OVERRIDE;
+  virtual std::string GetAvailabilityMessage(AvailabilityResult result,
+                                             Manifest::Type type,
+                                             const GURL& url) const OVERRIDE;
 
   virtual std::set<Context>* GetContexts() OVERRIDE;
 
  protected:
   Availability CreateAvailability(AvailabilityResult result) const;
   Availability CreateAvailability(AvailabilityResult result,
                                   Manifest::Type type) const;
+  Availability CreateAvailability(AvailabilityResult result,
+                                  const GURL& url) const;
   bool IsIdInWhitelist(const std::string& extension_id) const;
 
  private:
   // For clarity and consistency, we handle the default value of each of these
   // members the same way: it matches everything. It is up to the higher level
   // code that reads Features out of static data to validate that data and set
   // sensible defaults.
   std::set<std::string> whitelist_;
   std::set<Manifest::Type> extension_types_;
   std::set<Context> contexts_;
+  URLPatternSet matches_;
   Location location_;  // we only care about component/not-component now
   Platform platform_;  // we only care about chromeos/not-chromeos now
   int min_manifest_version_;
   int max_manifest_version_;
   chrome::VersionInfo::Channel channel_;
 
   FRIEND_TEST_ALL_PREFIXES(ExtensionSimpleFeatureTest, Context);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_