MIPS: port Stop using with explicitly to implement try/catch.

Port r8224 (bdec5d6)

Original commit message:
The AST for TryCatch gives us enough structure that we do not need to expand
it to explicitly include a with. Try/catch is still handled the same as
before at runtime.

BUG=
TEST=

Review URL: http://codereview.chromium.org//7134037
Patch from Paul Lind <plind44@gmail.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8226 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/macro-assembler-mips.cc

@@ -2016,6 +2016,12 @@ void MacroAssembler::Call(Label* target) {
 }
 
 
+void MacroAssembler::Push(Handle<Object> handle) {
+  li(at, Operand(handle));
+  push(at);
+}
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 
 void MacroAssembler::DebugBreak() {

src/mips/macro-assembler-mips.h

@@ -471,6 +471,9 @@ DECLARE_NOTARGET_PROTOTYPE(Ret)
     sw(src, MemOperand(sp, 0));
   }
 
+  // Push a handle.
+  void Push(Handle<Object> handle);
+
   // Push two registers. Pushes leftmost register first (to highest address).
   void Push(Register src1, Register src2) {
     Subu(sp, sp, Operand(2 * kPointerSize));