Enforce the 'requirements' field in manifests.

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index 5216471f2a5efda80ea1702b3cddf755c5082f2a..22ca9fb9e72f599c8d42e0856c963e19a6256461 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -112,6 +112,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     DISABLE_USER_ACTION = 1 << 0,
     DISABLE_PERMISSIONS_INCREASE = 1 << 1,
     DISABLE_RELOAD = 1 << 2,
+    DISABLE_UNSUPPORTED_REQUIREMENT = 1 << 3
   };
 
   enum InstallType {
@@ -140,6 +141,16 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     SYNC_TYPE_APP
   };
 
+  // Declared requirements for the extension.
+  struct Requirements {
+    Requirements();
+    ~Requirements();
+
+    bool webgl;
+    bool css3d;
+    bool npapi;
+  };
+
   // An NPAPI plugin included in the extension.
   struct PluginInfo {
     FilePath path;  // Path to the plugin.
@@ -592,6 +603,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
 
   // Accessors:
 
+  const Requirements& requirements() const { return requirements_; }
   const FilePath& path() const { return path_; }
   const GURL& url() const { return extension_url_; }
   Location location() const;
@@ -830,6 +842,8 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   bool LoadNaClModules(string16* error);
   bool LoadWebAccessibleResources(string16* error);
   bool LoadSandboxedPages(string16* error);
+  // Must be called after LoadPlugins().
+  bool LoadRequirements(string16* error);
   bool LoadDefaultLocale(string16* error);
   bool LoadOfflineEnabled(string16* error);
   bool LoadOptionsPage(string16* error);
@@ -933,7 +947,6 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
       const APIPermissionSet& permissions) const;
 
   bool CheckMinimumChromeVersion(string16* error) const;
-  bool CheckRequirements(string16* error) const;
 
   // Check that platform app features are valid. Called after InitFromValue.
   bool CheckPlatformAppFeatures(std::string* utf8_error) const;
@@ -963,6 +976,9 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // the case when we know the manifest version actually is 1.
   int manifest_version_;
 
+  // The requirements declared in the manifest.
+  Requirements requirements_;
+
   // The absolute path to the directory the extension is stored in.
   FilePath path_;