Prevent chrome.app JSON schema from loading on every page

chrome/renderer/extensions/chrome_v8_context.cc

Index: chrome/renderer/extensions/chrome_v8_context.cc
diff --git a/chrome/renderer/extensions/chrome_v8_context.cc b/chrome/renderer/extensions/chrome_v8_context.cc
index 5feff00051e05737eb9511ff939e01e70f4c0caf..fb1edd7ed51b964392796a48a78cb35c1d20869c 100644
--- a/chrome/renderer/extensions/chrome_v8_context.cc
+++ b/chrome/renderer/extensions/chrome_v8_context.cc
@@ -154,9 +154,20 @@ bool ChromeV8Context::CallChromeHiddenMethod(
 
 Feature::Availability ChromeV8Context::GetAvailability(
     const std::string& api_name) {
+  return GetAvailabilityInternal(api_name, extension_);
+}
+
+Feature::Availability ChromeV8Context::GetAvailabilityForContext(
+    const std::string& api_name) {
+  return GetAvailabilityInternal(api_name, NULL);
+}
+
+Feature::Availability ChromeV8Context::GetAvailabilityInternal(
+    const std::string& api_name,
+    const Extension* extension) {
   return ExtensionAPI::GetSharedInstance()->IsAvailable(
       api_name,
-      extension_,
+      extension,
       context_type_,
       UserScriptSlave::GetDataSourceURLForFrame(web_frame_));
 }