Refactor FrameAndConstantPoolScope and ConstantPoolUnavailableScope to be architecture independent

src/x87/assembler-x87.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 945 matching lines @@
 
   byte byte_at(int pos) { return buffer_[pos]; }
   void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
 
   // Allocate a constant pool of the correct size for the generated code.
   Handle<ConstantPoolArray> NewConstantPool(Isolate* isolate);
 
   // Generate the constant pool for the generated code.
   void PopulateConstantPool(ConstantPoolArray* constant_pool);
 
+  bool is_constant_pool_available() const { return false; }
+
  protected:
   byte* addr_at(int pos) { return buffer_ + pos; }
 
+  void set_constant_pool_available(bool available) {
+    // Constant pool is not supported on x87.
+    UNREACHABLE();
+  }
+
 
  private:
   uint32_t long_at(int pos)  {
     return *reinterpret_cast<uint32_t*>(addr_at(pos));
   }
   void long_at_put(int pos, uint32_t x)  {
     *reinterpret_cast<uint32_t*>(addr_at(pos)) = x;
   }
 
   // code emission
@@ skipping 39 matching lines @@
   void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
 
   friend class CodePatcher;
   friend class EnsureSpace;
 
   // code generation
   RelocInfoWriter reloc_info_writer;
 
   PositionsRecorder positions_recorder_;
   friend class PositionsRecorder;
+
+  // constant pool
+  friend class FrameAndConstantPoolScope;
+  friend class ConstantPoolUnavailableScope;
 };
 
 
 // Helper class that ensures that there is enough space for generating
 // instructions and relocation information.  The constructor makes
 // sure that there is enough space and (in debug mode) the destructor
 // checks that we did not generate too much.
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) {
@@ skipping 13 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X87_ASSEMBLER_X87_H_