Misc debugger enhancements and bug fixes....

src/debug.h

Index: src/debug.h
===================================================================
--- src/debug.h	(revision 6165)
+++ src/debug.h	(working copy)
@@ -32,6 +32,7 @@
 #include "debug-agent.h"
 #include "execution.h"
 #include "factory.h"
+#include "flags.h"
 #include "hashmap.h"
 #include "platform.h"
 #include "string-stream.h"
@@ -772,6 +773,15 @@
       }
     }
 
+    if (((event == v8::BeforeCompile) || (event == v8::AfterCompile)) &&
+        !FLAG_debug_compile_events) {
+      return false;
+
+    } else if ((event == v8::ScriptCollected) &&
+               !FLAG_debug_script_collected_events) {
+      return false;
+    }
+
     // Currently argument event is not used.
     return !compiling_natives_ && Debugger::IsDebuggerActive();
   }