Lazy load chrome.* APIs

chrome/renderer/resources/extensions/last_error.js

Index: chrome/renderer/resources/extensions/last_error.js
diff --git a/chrome/renderer/resources/extensions/last_error.js b/chrome/renderer/resources/extensions/last_error.js
index 2b38a2910e4a5dfa9b0acef1a246ed6c042ffd73..5eb5c01206572febb8b5abc2f14ea5f08a76c772 100644
--- a/chrome/renderer/resources/extensions/last_error.js
+++ b/chrome/renderer/resources/extensions/last_error.js
@@ -3,16 +3,17 @@
 // found in the LICENSE file.
 
 requireNative('runtime');
+var GetAvailability = requireNative('v8_context').GetAvailability;
 
 function set(message) {
   var errorObject = { 'message': message };
-  if (chrome.extension)
+  if (GetAvailability('extension').is_available)
     chrome.extension.lastError = errorObject;
   chrome.runtime.lastError = errorObject;
 };
 
 function clear() {
-  if (chrome.extension)
+  if (GetAvailability('extension').is_available)
     delete chrome.extension.lastError;
   delete chrome.runtime.lastError;
 };