Change the algorithm and generated code for parallel moves on IA32.

src/lithium.h

Index: src/lithium.h
diff --git a/src/lithium.h b/src/lithium.h
index f4ae2aa2c9f76446d2e82f20f691246edd45a33f..5f7c92fce46015ff1108f9e8e31b0bc92c9d374b 100644
--- a/src/lithium.h
+++ b/src/lithium.h
@@ -35,9 +35,6 @@
 namespace v8 {
 namespace internal {
 
-class LCodeGen;
-class Translation;
-
 class LParallelMove : public ZoneObject {
  public:
   LParallelMove() : move_operands_(4) { }