Convert app_bindings.js to the schema_generated_bindings.js infrastructure.

chrome/common/extensions/feature.h

Index: chrome/common/extensions/feature.h
diff --git a/chrome/common/extensions/feature.h b/chrome/common/extensions/feature.h
index 0a956890be5918ddad00c873c5540ea9f8409dc2..90cd920faa7c868102a3a36743775acb2d03ca05 100644
--- a/chrome/common/extensions/feature.h
+++ b/chrome/common/extensions/feature.h
@@ -24,9 +24,18 @@ class Feature {
   // The JavaScript contexts the feature is supported in.
   enum Context {
     UNSPECIFIED_CONTEXT,
-    PRIVILEGED_CONTEXT,  // A context in a privileged extension process.
-    UNPRIVILEGED_CONTEXT,  // A context in a normal, unprivileged renderer.
-    CONTENT_SCRIPT_CONTEXT  // A context from a content script.
+
+    // A context in a privileged extension process.
+    PRIVILEGED_CONTEXT,
+
+    // A context in a normal, unprivileged renderer.
+    UNPRIVILEGED_CONTEXT,
+
+    // A context from a content script.
+    CONTENT_SCRIPT_CONTEXT,
+
+    // A normal web page. This should have an associated URL matching pattern.
+    WEB_PAGE_CONTEXT,
   };
 
   // The location required of extensions the feature is supported in.