[Courgette] Initial Implementation of LabelManager.

courgette/assembly_program.h

Index: courgette/assembly_program.h
diff --git a/courgette/assembly_program.h b/courgette/assembly_program.h
index ba7ad59f1823b2c1652d43300a04eed9d22efcf7..88cf2e82746eec7b79fc72cbd81f51a2bf73f966 100644
--- a/courgette/assembly_program.h
+++ b/courgette/assembly_program.h
@@ -13,29 +13,13 @@
 #include "base/memory/scoped_ptr.h"
 
 #include "courgette/disassembler.h"
+#include "courgette/image_utils.h"
 #include "courgette/memory_allocator.h"
 
 namespace courgette {
 
 class EncodedProgram;
 
-// A Label is a symbolic reference to an address.  Unlike a conventional
-// assembly language, we always know the address.  The address will later be
-// stored in a table and the Label will be replaced with the index into the
-// table.
-//
-// TODO(sra): Make fields private and add setters and getters.
-class Label {
- public:
-  static const int kNoIndex = -1;
-  Label() : rva_(0), index_(kNoIndex), count_(0) {}
-  explicit Label(RVA rva) : rva_(rva), index_(kNoIndex), count_(0) {}
-
-  RVA rva_;    // Address referred to by the label.
-  int index_;  // Index of address in address table, kNoIndex until assigned.
-  int count_;
-};
-
 typedef std::map<RVA, Label*> RVAToLabel;
 
 // Opcodes of simple assembly language