Heap::AllocateStringFromOneByte() and major part of its callers handlified.

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 5ee0d4bec06b0296048e698a407b2e0bc547f769..d6866d004dd00251cb716bee4233c0b5016343e4 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -365,11 +365,11 @@ Object* Context::DeoptimizedCodeListHead() {
 
 
 Handle<Object> Context::ErrorMessageForCodeGenerationFromStrings() {
-  Handle<Object> result(error_message_for_code_gen_from_strings(),
-                        GetIsolate());
+  Isolate* isolate = GetIsolate();
+  Handle<Object> result(error_message_for_code_gen_from_strings(), isolate);
   if (!result->IsUndefined()) return result;
-  return GetIsolate()->factory()->NewStringFromOneByte(STATIC_ASCII_VECTOR(
-      "Code generation from strings disallowed for this context"));
+  return isolate->factory()->NewStringFromStaticAscii(
+      "Code generation from strings disallowed for this context");
 }