[Extensions] DCHECK that ExtensionFunctions respond (and only once)

extensions/browser/extension_function_dispatcher.cc

Index: extensions/browser/extension_function_dispatcher.cc
diff --git a/extensions/browser/extension_function_dispatcher.cc b/extensions/browser/extension_function_dispatcher.cc
index 96b333cee7defb32c7c2a225c8e0d8db1c80bedd..502bec4b8cb0c49785c3d740ef6ed9eae1659765 100644
--- a/extensions/browser/extension_function_dispatcher.cc
+++ b/extensions/browser/extension_function_dispatcher.cc
@@ -374,7 +374,7 @@ void ExtensionFunctionDispatcher::DispatchOnIOThread(
   if (!extension) {
     // Skip all of the UMA, quota, event page, activity logging stuff if there
     // isn't an extension, e.g. if the function call was from WebUI.
-    function->Run()->Execute();
+    function->RunWithValidation()->Execute();
     return;
   }
 
@@ -393,7 +393,7 @@ void ExtensionFunctionDispatcher::DispatchOnIOThread(
         FROM_HERE_WITH_EXPLICIT_FUNCTION(function->name()),
         tracked_objects::ScopedProfile::ENABLED);
     base::ElapsedTimer timer;
-    function->Run()->Execute();
+    function->RunWithValidation()->Execute();
     // TODO(devlin): Once we have a baseline metric for how long functions take,
     // we can create a handful of buckets and record the function name so that
     // we can find what the fastest/slowest are.
@@ -506,7 +506,7 @@ void ExtensionFunctionDispatcher::DispatchWithCallbackInternal(
   if (!extension) {
     // Skip all of the UMA, quota, event page, activity logging stuff if there
     // isn't an extension, e.g. if the function call was from WebUI.
-    function->Run()->Execute();
+    function->RunWithValidation()->Execute();
     return;
   }
 
@@ -533,7 +533,7 @@ void ExtensionFunctionDispatcher::DispatchWithCallbackInternal(
         FROM_HERE_WITH_EXPLICIT_FUNCTION(function->name()),
         tracked_objects::ScopedProfile::ENABLED);
     base::ElapsedTimer timer;
-    function->Run()->Execute();
+    function->RunWithValidation()->Execute();
     // TODO(devlin): Once we have a baseline metric for how long functions take,
     // we can create a handful of buckets and record the function name so that
     // we can find what the fastest/slowest are.