Make macro-assembler-x64 deal with handles to objects in new space by default.

src/x64/lithium-gap-resolver-x64.cc

Index: src/x64/lithium-gap-resolver-x64.cc
diff --git a/src/x64/lithium-gap-resolver-x64.cc b/src/x64/lithium-gap-resolver-x64.cc
index 71db17c93156e9a55dc9724949d91bc17b444125..6d07db6cdabb3aee6197967dc9198392ccfcdd24 100644
--- a/src/x64/lithium-gap-resolver-x64.cc
+++ b/src/x64/lithium-gap-resolver-x64.cc
@@ -200,7 +200,7 @@ void LGapResolver::EmitMove(int index) {
       } else if (cgen_->IsInteger32Constant(constant_source)) {
         __ movl(dst, Immediate(cgen_->ToInteger32(constant_source)));
       } else {
-        __ LoadObject(dst, cgen_->ToHandle(constant_source));
+        __ Move(dst, cgen_->ToHandle(constant_source));
       }
     } else if (destination->IsDoubleRegister()) {
       double v = cgen_->ToDouble(constant_source);
@@ -222,7 +222,7 @@ void LGapResolver::EmitMove(int index) {
         // value.
         __ movq(dst, Immediate(cgen_->ToInteger32(constant_source)));
       } else {
-        __ LoadObject(kScratchRegister, cgen_->ToHandle(constant_source));
+        __ Move(kScratchRegister, cgen_->ToHandle(constant_source));
         __ movq(dst, kScratchRegister);
       }
     }