Cleanup: Rename Simulator::watched_stops to match style guide.

src/arm/simulator-arm.h

Index: src/arm/simulator-arm.h
diff --git a/src/arm/simulator-arm.h b/src/arm/simulator-arm.h
index 907a5906658d19c99c37c5795c5004ece9923a1d..b918ecf9638a4825163f0f1874f54877a5371bd0 100644
--- a/src/arm/simulator-arm.h
+++ b/src/arm/simulator-arm.h
@@ -414,14 +414,14 @@ class Simulator {
   static const uint32_t kStopDisabledBit = 1 << 31;
 
   // A stop is enabled, meaning the simulator will stop when meeting the
-  // instruction, if bit 31 of watched_stops[code].count is unset.
-  // The value watched_stops[code].count & ~(1 << 31) indicates how many times
+  // instruction, if bit 31 of watched_stops_[code].count is unset.
+  // The value watched_stops_[code].count & ~(1 << 31) indicates how many times
   // the breakpoint was hit or gone through.
   struct StopCountAndDesc {
     uint32_t count;
     char* desc;
   };
-  StopCountAndDesc watched_stops[kNumOfWatchedStops];
+  StopCountAndDesc watched_stops_[kNumOfWatchedStops];
 };