Refactor FrameAndConstantPoolScope and ConstantPoolUnavailableScope to be architecture independent

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index c6b12b76d7a8002477eb7791081ee861b97e4d4c..7f2d5076e7da8fc46433124df2b7560071446035 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -1111,6 +1111,8 @@ class Assembler : public AssemblerBase {
   // Generate the constant pool for the generated code.
   void PopulateConstantPool(ConstantPoolArray* constant_pool);
 
+  bool is_constant_pool_available() const { return false; }
+
  protected:
   // Relocation for a type-recording IC has the AST id added to it.  This
   // member variable is a way to pass the information from the call site to
@@ -1174,6 +1176,11 @@ class Assembler : public AssemblerBase {
     return block_buffer_growth_;
   }
 
+  void set_constant_pool_available(bool available) {
+    // Constant pool is not supported on mips.
+    UNREACHABLE();
+  }
+
  private:
   // Buffer size and constant pool distance are checked together at regular
   // intervals of kBufferCheckInterval emitted bytes.
@@ -1368,6 +1375,10 @@ class Assembler : public AssemblerBase {
   PositionsRecorder positions_recorder_;
   friend class PositionsRecorder;
   friend class EnsureSpace;
+
+  // constant pool
+  friend class FrameAndConstantPoolScope;
+  friend class ConstantPoolUnavailableScope;
 };