Revert r15361 "Improved function entry hook coverage" because of ARM build error.

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 739 matching lines @@
 
 
 void StubFailureTrampolineStub::GenerateAheadOfTime(Isolate* isolate) {
   StubFailureTrampolineStub stub1(NOT_JS_FUNCTION_STUB_MODE);
   StubFailureTrampolineStub stub2(JS_FUNCTION_STUB_MODE);
   stub1.GetCode(isolate)->set_is_pregenerated(true);
   stub2.GetCode(isolate)->set_is_pregenerated(true);
 }
 
 
+FunctionEntryHook ProfileEntryHookStub::entry_hook_ = NULL;
+
+
 void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function,
                                                intptr_t stack_pointer) {
-  FunctionEntryHook entry_hook = Isolate::Current()->function_entry_hook();
-  ASSERT(entry_hook != NULL);
-  entry_hook(function, 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;
+}
+
+
 static void InstallDescriptor(Isolate* isolate, HydrogenCodeStub* stub) {
   int major_key = stub->MajorKey();
   CodeStubInterfaceDescriptor* descriptor =
       isolate->code_stub_interface_descriptor(major_key);
   if (!descriptor->initialized()) {
     stub->InitializeInterfaceDescriptor(isolate, descriptor);
   }
 }
 
 
@@ skipping 37 matching lines @@
   InstallDescriptor(isolate, &stub3);
 }
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal