Fix bug in register requirements for function.apply....

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
===================================================================
--- src/arm/lithium-arm.cc	(revision 6712)
+++ src/arm/lithium-arm.cc	(working copy)
@@ -70,7 +70,6 @@
   for (UseIterator it(this); it.HasNext(); it.Advance()) {
     LOperand* operand = it.Next();
     ASSERT(LUnallocated::cast(operand)->HasFixedPolicy() ||
-           LUnallocated::cast(operand)->IsUsedAtStart() ||
            !LUnallocated::cast(operand)->HasRegisterPolicy());
   }
   for (TempIterator it(this); it.HasNext(); it.Advance()) {
@@ -1133,8 +1132,8 @@
 LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
   LOperand* function = UseFixed(instr->function(), r1);
   LOperand* receiver = UseFixed(instr->receiver(), r0);
-  LOperand* length = UseRegisterAtStart(instr->length());
-  LOperand* elements = UseRegisterAtStart(instr->elements());
+  LOperand* length = UseFixed(instr->length(), r2);
+  LOperand* elements = UseFixed(instr->elements(), r3);
   LApplyArguments* result = new LApplyArguments(function,
                                                 receiver,
                                                 length,