Move definition of NegateConditon from assembler*-inl.h files to...

src/x64/assembler-x64-inl.h

Index: src/x64/assembler-x64-inl.h
===================================================================
--- src/x64/assembler-x64-inl.h	(revision 4877)
+++ src/x64/assembler-x64-inl.h	(working copy)
@@ -35,16 +35,11 @@
 namespace v8 {
 namespace internal {
 
-inline Condition NegateCondition(Condition cc) {
-  return static_cast<Condition>(cc ^ 1);
-}
 
-
 // -----------------------------------------------------------------------------
 // Implementation of Assembler
 
 
-
 void Assembler::emitl(uint32_t x) {
   Memory::uint32_at(pc_) = x;
   pc_ += sizeof(uint32_t);