More precise break points and stepping when debugging...

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
===================================================================
--- src/mips/assembler-mips.cc	(revision 4816)
+++ src/mips/assembler-mips.cc	(working copy)
@@ -1046,13 +1046,16 @@
 }
 
 
-void Assembler::WriteRecordedPositions() {
+bool Assembler::WriteRecordedPositions() {
+  bool written = false;
+
   // Write the statement position if it is different from what was written last
   // time.
   if (current_statement_position_ != written_statement_position_) {
     CheckBuffer();
     RecordRelocInfo(RelocInfo::STATEMENT_POSITION, current_statement_position_);
     written_statement_position_ = current_statement_position_;
+    written = true;
   }
 
   // Write the position if it is different from what was written last time and
@@ -1062,7 +1065,11 @@
     CheckBuffer();
     RecordRelocInfo(RelocInfo::POSITION, current_position_);
     written_position_ = current_position_;
+    written = true;
   }
+
+  // Return whether something was written.
+  return written;
 }