Revert 12083: Implements a new API to set a function entry hook for profiling.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index f19063230a7d953d7dabe5c152c6e0eaf8798bc9..5a076d2f1387fba5b3d16f7b9935867aab99a5f9 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -73,8 +73,7 @@ namespace internal {
   V(DebuggerStatement)                   \
   V(StringDictionaryLookup)              \
   V(ElementsTransitionAndStore)          \
-  V(StoreArrayLiteralElement)            \
-  V(ProfileEntryHook)
+  V(StoreArrayLiteralElement)
 
 // List of code stubs only used on ARM platforms.
 #ifdef V8_TARGET_ARCH_ARM
@@ -1143,37 +1142,6 @@ class StoreArrayLiteralElementStub : public CodeStub {
   DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
 };
 
-
-class ProfileEntryHookStub : public CodeStub {
- public:
-  explicit ProfileEntryHookStub() {}
-
-  // The profile entry hook function is not allowed to cause a GC.
-  virtual bool SometimesSetsUpAFrame() { return false; }
-
-  // Generates a call to the entry hook if it's enabled.
-  static void MaybeCallEntryHook(MacroAssembler* masm);
-
-  // Sets or unsets the entry hook function. Returns true on success,
-  // false on an attempt to replace a non-NULL entry hook with another
-  // non-NULL hook.
-  static bool SetFunctionEntryHook(FunctionEntryHook entry_hook);
-
- private:
-  static void EntryHookTrampoline(intptr_t function,
-                                  intptr_t stack_pointer);
-
-  Major MajorKey() { return ProfileEntryHook; }
-  int MinorKey() { return 0; }
-
-  void Generate(MacroAssembler* masm);
-
-  // The current function entry hook.
-  static FunctionEntryHook entry_hook_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
-};
-
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_