X87: Move stack unwinding logic into the runtime.

src/x87/macro-assembler-x87.h

Index: src/x87/macro-assembler-x87.h
diff --git a/src/x87/macro-assembler-x87.h b/src/x87/macro-assembler-x87.h
index 9d9556c5f2dabc8e64be1f61db1edc3069b5b8bd..061709be9c050efb6ff5578ad47b22bc4d58b56b 100644
--- a/src/x87/macro-assembler-x87.h
+++ b/src/x87/macro-assembler-x87.h
@@ -541,12 +541,6 @@ class MacroAssembler: public Assembler {
   // Unlink the stack handler on top of the stack from the try handler chain.
   void PopTryHandler();
 
-  // Throw to the top handler in the try hander chain.
-  void Throw(Register value);
-
-  // Throw past all JS frames to the top JS entry frame.
-  void ThrowUncatchable(Register value);
-
   // ---------------------------------------------------------------------------
   // Inline caching support
 
@@ -970,10 +964,6 @@ class MacroAssembler: public Assembler {
                           Register bitmap_reg,
                           Register mask_reg);
 
-  // Helper for throwing exceptions.  Compute a handler address and jump to
-  // it.  See the implementation for register usage.
-  void JumpToHandlerEntry();
-
   // Compute memory operands for safepoint stack slots.
   Operand SafepointRegisterSlot(Register reg);
   static int SafepointRegisterStackIndex(int reg_code);