Streamline throwing in the C entry stub.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index b06d801b647333c13cf765dd5093b4b0281ef47f..ae9bb5a1f0132dfd6964539ab825c7330979863d 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -496,10 +496,11 @@ class MacroAssembler: public Assembler {
   // Unlink the stack handler on top of the stack from the try handler chain.
   void PopTryHandler();
 
-  // Activate the top handler in the try hander chain.
+  // Throw to the top handler in the try hander chain.
   void Throw(Register value);
 
-  void ThrowUncatchable(UncatchableExceptionType type, Register value);
+  // Throw past all JS frames to the top JS entry frame.
+  void ThrowUncatchable(Register value);
 
   // ---------------------------------------------------------------------------
   // Inline caching support