[Isolates] Fix memory leaks in Isolate and Logger.

src/isolate.cc

 // Copyright 2006-2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 481 matching lines @@
   stats_table_ = NULL;
 
   delete logger_;
   logger_ = NULL;
 
   delete counters_;
   counters_ = NULL;
   delete cpu_features_;
   cpu_features_ = NULL;
 
+  delete handle_scope_implementer_;
+  handle_scope_implementer_ = NULL;
+  delete break_access_;
+  break_access_ = NULL;
+
   delete compilation_cache_;
   compilation_cache_ = NULL;
   delete bootstrapper_;
   bootstrapper_ = NULL;
   delete pc_to_code_cache_;
   pc_to_code_cache_ = NULL;
   delete write_input_buffer_;
   write_input_buffer_ = NULL;
 
   delete context_switcher_;
@@ skipping 66 matching lines @@
   write_input_buffer_ = new StringInputBuffer();
   global_handles_ = new GlobalHandles(this);
   bootstrapper_ = new Bootstrapper();
   cpu_features_ = new CpuFeatures();
   handle_scope_implementer_ = new HandleScopeImplementer();
   stub_cache_ = new StubCache(this);
   ast_sentinels_ = new AstSentinels();
   regexp_stack_ = new RegExpStack();
   regexp_stack_->isolate_ = this;
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
-  debugger_ = new Debugger();
-  debugger_->isolate_ = this;
-#endif
-
 #ifdef ENABLE_LOGGING_AND_PROFILING
   producer_heap_profile_ = new ProducerHeapProfile();
   producer_heap_profile_->isolate_ = this;
 #endif
 
   state_ = PREINITIALIZED;
   return true;
 }
 
 
@@ skipping 172 matching lines @@
   PerIsolateThreadData* previous_thread_data = item->previous_thread_data;
   Isolate* previous_isolate = item->previous_isolate;
 
   delete item;
 
   // Reinit the current thread for the isolate it was running before this one.
   SetIsolateThreadLocals(previous_isolate, previous_thread_data);
 }
 
 } }  // namespace v8::internal