Remove FOR_EACH_OBSERVER macro usage in chrome/browser/extensions

chrome/browser/extensions/extension_error_reporter.cc

Index: chrome/browser/extensions/extension_error_reporter.cc
diff --git a/chrome/browser/extensions/extension_error_reporter.cc b/chrome/browser/extensions/extension_error_reporter.cc
index 3f089e4a521f0bbead26ba4990deb45a7a9757de..320fbd01f1d0c1880e14d89ebe50712c1a34bcb8 100644
--- a/chrome/browser/extensions/extension_error_reporter.cc
+++ b/chrome/browser/extensions/extension_error_reporter.cc
@@ -60,9 +60,8 @@ void ExtensionErrorReporter::ReportLoadError(
       path_str.c_str(),
       error.c_str()));
   ReportError(message, be_noisy);
-  FOR_EACH_OBSERVER(Observer,
-                    observers_,
-                    OnLoadFailure(browser_context, extension_path, error));
+  for (auto& observer : observers_)
+    observer.OnLoadFailure(browser_context, extension_path, error);
 }
 
 void ExtensionErrorReporter::ReportError(const base::string16& message,