MIPS: Generator object "next" method takes optional send value.

Port r15028 (258a047)

Original commit message:
Update the generators implementation to make "next" also do the job of
what was previously called "send" by taking an optional argument.
Remove send, and do a bunch of renamings.

BUG=v8:2355, v8:2715

Review URL: https://codereview.chromium.org/16735005
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15049 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/full-codegen-mips.cc

@@ -2036,10 +2036,10 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       // [sp + 1 * kPointerSize] iter
       // [sp + 0 * kPointerSize] g
 
-      Label l_catch, l_try, l_resume, l_send, l_call, l_loop;
+      Label l_catch, l_try, l_resume, l_next, l_call, l_loop;
       // Initial send value is undefined.
       __ LoadRoot(a0, Heap::kUndefinedValueRootIndex);
-      __ Branch(&l_send);
+      __ Branch(&l_next);
 
       // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
       __ bind(&l_catch);
@@ -2074,15 +2074,15 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       __ bind(&l_resume);                                // received in a0
       __ PopTryHandler();
 
-      // receiver = iter; f = iter.send; arg = received;
-      __ bind(&l_send);
+      // receiver = iter; f = iter.next; arg = received;
+      __ bind(&l_next);
       __ lw(a3, MemOperand(sp, 1 * kPointerSize));       // iter
       __ push(a3);                                       // iter
       __ push(a0);                                       // received
       __ mov(a0, a3);                                    // iter
-      __ LoadRoot(a2, Heap::ksend_stringRootIndex);      // "send"
-      Handle<Code> send_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(send_ic);                                   // iter.send in a0
+      __ LoadRoot(a2, Heap::knext_stringRootIndex);      // "next"
+      Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
+      CallIC(next_ic);                                   // iter.next in a0
       __ mov(a0, v0);
 
       // result = f.call(receiver, arg);
@@ -2187,7 +2187,7 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
 
   // If we are sending a value and there is no operand stack, we can jump back
   // in directly.
-  if (resume_mode == JSGeneratorObject::SEND) {
+  if (resume_mode == JSGeneratorObject::NEXT) {
     Label slow_resume;
     __ Branch(&slow_resume, ne, a3, Operand(zero_reg));
     __ lw(a3, FieldMemOperand(t0, JSFunction::kCodeEntryOffset));