Revert r6180 as it caused test failures

src/debug.h

 // Copyright 2006-2008 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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_DEBUG_H_
 #define V8_DEBUG_H_
 
 #include "assembler.h"
 #include "debug-agent.h"
 #include "execution.h"
 #include "factory.h"
-#include "flags.h"
 #include "hashmap.h"
 #include "platform.h"
 #include "string-stream.h"
 #include "v8threads.h"
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 #include "../include/v8-debug.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 720 matching lines @@
   inline static bool EventActive(v8::DebugEvent event) {
     ScopedLock with(debugger_access_);
 
     // Check whether the message handler was been cleared.
     if (debugger_unload_pending_) {
       if (Debug::debugger_entry() == NULL) {
         UnloadDebugger();
       }
     }
 
-    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();
   }
 
   static void set_compiling_natives(bool compiling_natives) {
     Debugger::compiling_natives_ = compiling_natives;
   }
   static bool compiling_natives() { return Debugger::compiling_natives_; }
   static void set_loading_debugger(bool v) { is_loading_debugger_ = v; }
   static bool is_loading_debugger() { return Debugger::is_loading_debugger_; }
@@ skipping 221 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(MessageDispatchHelperThread);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 #endif  // V8_DEBUG_H_