Fixed test memory leaks

src/log.h

Index: src/log.h
diff --git a/src/log.h b/src/log.h
index d238f9bece7dc6eda5cc993b1b7111080c1b270f..8573d7169f1a41013cc56a01c166c4b6716ce708 100644
--- a/src/log.h
+++ b/src/log.h
@@ -83,7 +83,7 @@ class LogMessageBuilder;
 #endif
 
 
-class VMState {
+class VMState BASE_EMBEDDED {
 #ifdef ENABLE_LOGGING_AND_PROFILING
  public:
   explicit VMState(StateTag state);
@@ -252,6 +252,9 @@ class Logger {
   // A stack of VM states.
   static VMState* current_state_;
 
+  // Singleton bottom or default vm state.
+  static VMState bottom_state_;
+
   // SlidingStateWindow instance keeping a sliding window of the most
   // recent VM states.
   static SlidingStateWindow* sliding_state_window_;