Always include debugger support.

test/cctest/test-debug.cc

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-#ifdef ENABLE_DEBUGGER_SUPPORT
-
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "api.h"
 #include "cctest.h"
 #include "compilation-cache.h"
 #include "debug.h"
 #include "deoptimizer.h"
 #include "frames.h"
@@ skipping 7614 matching lines @@
       "a = b = c = 2;                  \n"
       "bar();                          \n";
   v8::Local<v8::Value> result = PreCompileCompileRun(source);
   CHECK(result->IsString());
   v8::String::Utf8Value utf8(result);
   CHECK_EQ("bar", *utf8);
 
   v8::Debug::SetDebugEventListener2(NULL);
   CheckDebuggerUnloaded();
 }
-
-
-#endif  // ENABLE_DEBUGGER_SUPPORT