Split HPhase for Lithium and Hydrogen using common CompilationPhase base.

src/lithium.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 760 matching lines @@
 int ElementsKindToShiftSize(ElementsKind elements_kind);
 int StackSlotOffset(int index);
 
 enum NumberUntagDMode {
   NUMBER_CANDIDATE_IS_SMI,
   NUMBER_CANDIDATE_IS_ANY_TAGGED,
   NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE
 };
 
 
+class LPhase : public CompilationPhase {
+ public:
+  LPhase(const char* name, LAllocator* allocator);
+  LPhase(const char* name, LChunk* chunk);
+  ~LPhase();
+
+ private:
+  LAllocator* allocator_;
+  LChunk* chunk_;
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_H_