Add out-of-line constant pool support to Arm.

src/a64/assembler-a64.h

 // Copyright 2013 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 1772 matching lines @@
 
    private:
     Assembler* assem_;
 
     DISALLOW_IMPLICIT_CONSTRUCTORS(BlockConstPoolScope);
   };
 
   // Check if is time to emit a constant pool.
   void CheckConstPool(bool force_emit, bool require_jump);
 
+  // Allocate a constant pool of the correct size for the generated code.
+  MaybeObject* AllocateConstantPool(Heap* heap);
+
+  // Generate the constant pool for the generated code.
+  void PopulateConstantPool(ConstantPoolArray* constant_pool);
 
   // Returns true if we should emit a veneer as soon as possible for a branch
   // which can at most reach to specified pc.
   bool ShouldEmitVeneer(int max_reachable_pc,
                         int margin = kVeneerDistanceMargin);
   bool ShouldEmitVeneers(int margin = kVeneerDistanceMargin) {
     return ShouldEmitVeneer(unresolved_branches_first_limit(), margin);
   }
 
   // The maximum code size generated for a veneer. Currently one branch
@@ skipping 399 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_ASSEMBLER_A64_H_