Simplify AssemblerPositionsRecorder.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index ab4493bce75d2a746806184300c3338cfb8526f3..c2bd2771c6837485691b1a3eb2e8972f945e4220 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -1160,26 +1160,29 @@ struct PositionState {
 class AssemblerPositionsRecorder : public PositionsRecorder {
  public:
   explicit AssemblerPositionsRecorder(Assembler* assembler)
-      : assembler_(assembler) {}
+      : assembler_(assembler),
+        current_position_(RelocInfo::kNoPosition),
+        written_position_(RelocInfo::kNoPosition),
+        current_statement_position_(RelocInfo::kNoPosition),
+        written_statement_position_(RelocInfo::kNoPosition) {}
 
   // Set current position to pos.
-  void RecordPosition(int pos);
+  bool RecordPosition(int pos);
 
   // Set current statement position to pos.
-  void RecordStatementPosition(int pos);
+  bool RecordStatementPosition(int pos);
 
+ private:
   // Write recorded positions to relocation information.
   bool WriteRecordedPositions();
 
-  int current_position() const { return state_.current_position; }
+  Assembler* assembler_;
 
-  int current_statement_position() const {
-    return state_.current_statement_position;
-  }
+  int current_position_;
+  int written_position_;
 
- private:
-  Assembler* assembler_;
-  PositionState state_;
+  int current_statement_position_;
+  int written_statement_position_;
 
   DISALLOW_COPY_AND_ASSIGN(AssemblerPositionsRecorder);
 };