Refactor FrameAndConstantPoolScope and ConstantPoolUnavailableScope to be architecture independent

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 e8ee605988b83571d409bfba8ecab2de68c8775b..e0c3a97ba920e095b49b88bc0dfcb33c5c928b34 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -1488,8 +1488,6 @@ class Assembler : public AssemblerBase {
   // Generate the constant pool for the generated code.
   void PopulateConstantPool(ConstantPoolArray* constant_pool);
 
-  bool is_constant_pool_available() const { return constant_pool_available_; }
-
   bool use_extended_constant_pool() const {
     return constant_pool_builder_.current_section() ==
            ConstantPoolArray::EXTENDED_SECTION;
@@ -1549,10 +1547,6 @@ class Assembler : public AssemblerBase {
            (pc_offset() < no_const_pool_before_);
   }
 
-  void set_constant_pool_available(bool available) {
-    constant_pool_available_ = available;
-  }
-
  private:
   int next_buffer_check_;  // pc offset of next buffer check
 
@@ -1615,10 +1609,6 @@ class Assembler : public AssemblerBase {
   // The bound position, before this we cannot do instruction elimination.
   int last_bound_pos_;
 
-  // Indicates whether the constant pool can be accessed, which is only possible
-  // if the pp register points to the current code object's constant pool.
-  bool constant_pool_available_;
-
   // Code emission
   inline void CheckBuffer();
   void GrowBuffer();
@@ -1654,9 +1644,6 @@ class Assembler : public AssemblerBase {
   friend class RelocInfo;
   friend class CodePatcher;
   friend class BlockConstPoolScope;
-  friend class FrameAndConstantPoolScope;
-  friend class ConstantPoolUnavailableScope;
-
   PositionsRecorder positions_recorder_;
   friend class PositionsRecorder;
   friend class EnsureSpace;