Refactoring: Make predictable code flag handling 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 3fab20bcb15734aba17e2406382ba68a603041ab..3a264acc3852c120af36dd2b2dcf85e55c901e45 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -652,11 +652,6 @@ class Assembler : public AssemblerBase {
   // Overrides the default provided by FLAG_debug_code.
   void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
 
-  // Avoids using instructions that vary in size in unpredictable ways between
-  // the snapshot and the running VM.  This is needed by the full compiler so
-  // that it can recompile code with debug support and fix the PC.
-  void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
-
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
   // Assembler functions are invoked in between GetCode() calls.
@@ -1185,8 +1180,6 @@ class Assembler : public AssemblerBase {
   // Jump unconditionally to given label.
   void jmp(Label* L) { b(L, al); }
 
-  bool predictable_code_size() const { return predictable_code_size_; }
-
   static bool use_immediate_embedded_pointer_loads(
       const Assembler* assembler) {
 #ifdef USE_BLX
@@ -1499,7 +1492,6 @@ class Assembler : public AssemblerBase {
   PositionsRecorder positions_recorder_;
 
   bool emit_debug_code_;
-  bool predictable_code_size_;
 
   friend class PositionsRecorder;
   friend class EnsureSpace;
@@ -1514,26 +1506,6 @@ class EnsureSpace BASE_EMBEDDED {
 };
 
 
-class PredictableCodeSizeScope {
- public:
-  explicit PredictableCodeSizeScope(Assembler* assembler)
-      : asm_(assembler) {
-    old_value_ = assembler->predictable_code_size();
-    assembler->set_predictable_code_size(true);
-  }
-
-  ~PredictableCodeSizeScope() {
-    if (!old_value_) {
-      asm_->set_predictable_code_size(false);
-    }
-  }
-
- private:
-  Assembler* asm_;
-  bool old_value_;
-};
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_