Improved function entry hook coverage

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
old mode 100644
new mode 100755
index 6b6e25019dedf6ebbbfe1344b250a656a813260f..32cef0fbbe1a35113353e9adb6e1c03d88141517
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -727,24 +727,11 @@ void StubFailureTrampolineStub::GenerateAheadOfTime(Isolate* isolate) {
 }
 
 
-FunctionEntryHook ProfileEntryHookStub::entry_hook_ = NULL;
-
-
 void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function,
                                                intptr_t stack_pointer) {
-  if (entry_hook_ != NULL)
-    entry_hook_(function, stack_pointer);
-}
-
-
-bool ProfileEntryHookStub::SetFunctionEntryHook(FunctionEntryHook entry_hook) {
-  // We don't allow setting a new entry hook over one that's
-  // already active, as the hooks won't stack.
-  if (entry_hook != 0 && entry_hook_ != 0)
-    return false;
-
-  entry_hook_ = entry_hook;
-  return true;
+  FunctionEntryHook entry_hook = Isolate::Current()->GetFunctionEntryHook();
+  if (entry_hook != NULL)
+    entry_hook(function, stack_pointer);
 }