Fix memory leak in the debugger.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/297373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21479 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug.cc

@@ -805,6 +805,8 @@ bool Debug::Load() {
 
 
 void Debug::Unload() {
+  ClearAllBreakPoints();
+
   // Return debugger is not loaded.
   if (!IsLoaded()) return;
 
@@ -3150,7 +3152,6 @@ void Debugger::UpdateState() {
     activate = debug->Load();
   } else if (debug->IsLoaded() && !activate) {
     isolate_->compilation_cache()->Enable();
-    debug->ClearAllBreakPoints();
     debug->Unload();
   }
   is_active_ = activate;

src/isolate.cc

@@ -1562,6 +1562,8 @@ void Isolate::Deinit() {
   if (state_ == INITIALIZED) {
     TRACE_ISOLATE(deinit);
 
+    debug()->Unload();
+
     if (concurrent_recompilation_enabled()) {
       optimizing_compiler_thread_->Stop();
       delete optimizing_compiler_thread_;