Add ARMv6 support for the out-of-line constant pool.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index e33f48a05b89e0354a529ff42011ba0a28176f8e..108d5cb0908045353a618e5e05868162697dccbe 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -1449,12 +1449,16 @@ class Assembler : public AssemblerBase {
   static Register GetCmpImmediateRegister(Instr instr);
   static int GetCmpImmediateRawImmediate(Instr instr);
   static bool IsNop(Instr instr, int type = NON_MARKING_NOP);
+  static bool IsMovImmed(Instr instr);
+  static bool IsOrrImmed(Instr instr);
   static bool IsMovT(Instr instr);
   static Instr GetMovTPattern();
   static bool IsMovW(Instr instr);
   static Instr GetMovWPattern();
   static Instr EncodeMovwImmediate(uint32_t immediate);
   static Instr PatchMovwImmediate(Instr instruction, uint32_t immediate);
+  static int DecodeShiftImm(Instr instr);
+  static Instr PatchShiftImm(Instr instr, int immed);
 
   // Constants in pools are accessed via pc relative addressing, which can
   // reach +/-4KB for integer PC-relative loads and +/-1KB for floating-point