MIPS: Move stack unwinding logic into the runtime.

src/mips64/macro-assembler-mips64.h

Index: src/mips64/macro-assembler-mips64.h
diff --git a/src/mips64/macro-assembler-mips64.h b/src/mips64/macro-assembler-mips64.h
index 52db677d5d961f04eac5c5fb5423ca1a724b8cf1..3d428f77766a4676bf530936d5be85f88286dc27 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -1000,13 +1000,6 @@ class MacroAssembler: public Assembler {
   // Must preserve the result register.
   void PopTryHandler();
 
-  // Passes thrown value to the handler of top of the try handler chain.
-  void Throw(Register value);
-
-  // Propagates an uncatchable exception to the top of the current JS stack's
-  // handler chain.
-  void ThrowUncatchable(Register value);
-
   // Copies a fixed number of fields of heap objects from src to dst.
   void CopyFields(Register dst, Register src, RegList temps, int field_count);
 
@@ -1723,10 +1716,6 @@ const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
                           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.
   static int SafepointRegisterStackIndex(int reg_code);
   MemOperand SafepointRegisterSlot(Register reg);