Revert 12069: Implements a new API to set a function entry hook for profiling

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 452 matching lines @@
       ElementsTransitionGenerator::
           GenerateMapChangeElementsTransition(masm);
     } else {
       UNREACHABLE();
     }
   }
   masm->bind(&fail);
   KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode_);
 }
 
-
-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;
-}
-
-
 } }  // namespace v8::internal