Fix compilation when disabling debugger support.

samples/lineprocessor.cc

Index: samples/lineprocessor.cc
diff --git a/samples/lineprocessor.cc b/samples/lineprocessor.cc
index 23e02142691dd1541b04c34d8fc2fb20717e069e..26e787f2b7d0d3ce2c886b96dea5aac8d5068719 100644
--- a/samples/lineprocessor.cc
+++ b/samples/lineprocessor.cc
@@ -25,19 +25,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-
-// This controls whether this sample is compiled with debugger support.
-// You may trace its usages in source text to see what parts of program
-// are responsible for debugging support.
-// Note that V8 itself should be compiled with enabled debugger support
-// to have it all working.
-#define SUPPORT_DEBUGGING
-
 #include <v8.h>
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
 #include <v8-debug.h>
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
 #include <fcntl.h>
 #include <string.h>
@@ -116,7 +108,7 @@ bool RunCppCycle(v8::Handle<v8::Script> script, v8::Local<v8::Context> context,
                  bool report_exceptions);
 
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
 v8::Persistent<v8::Context> debug_message_context;
 
 void DispatchDebugMessages() {
@@ -135,7 +127,7 @@ void DispatchDebugMessages() {
 
   v8::Debug::ProcessDebugMessages();
 }
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 int RunMain(int argc, char* argv[]) {
@@ -146,11 +138,11 @@ int RunMain(int argc, char* argv[]) {
   v8::Handle<v8::Value> script_name(NULL);
   int script_param_counter = 0;
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   int port_number = -1;
   bool wait_for_connection = false;
   bool support_callback = false;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   MainCycleType cycle_type = CycleInCpp;
 
@@ -164,7 +156,7 @@ int RunMain(int argc, char* argv[]) {
       cycle_type = CycleInCpp;
     } else if (strcmp(str, "--main-cycle-in-js") == 0) {
       cycle_type = CycleInJs;
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
     } else if (strcmp(str, "--callback") == 0) {
       support_callback = true;
     } else if (strcmp(str, "--wait-for-connection") == 0) {
@@ -172,7 +164,7 @@ int RunMain(int argc, char* argv[]) {
     } else if (strcmp(str, "-p") == 0 && i + 1 < argc) {
       port_number = atoi(argv[i + 1]);  // NOLINT
       i++;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
     } else if (strncmp(str, "--", 2) == 0) {
       printf("Warning: unknown flag %s.\nTry --help for options\n", str);
     } else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
@@ -219,7 +211,7 @@ int RunMain(int argc, char* argv[]) {
   // Enter the newly created execution environment.
   v8::Context::Scope context_scope(context);
 
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   debug_message_context = v8::Persistent<v8::Context>::New(context);
 
   v8::Locker locker;
@@ -231,7 +223,7 @@ int RunMain(int argc, char* argv[]) {
   if (port_number != -1) {
     v8::Debug::EnableAgent("lineprocessor", port_number, wait_for_connection);
   }
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   bool report_exceptions = true;
 
@@ -272,9 +264,9 @@ int RunMain(int argc, char* argv[]) {
 
 bool RunCppCycle(v8::Handle<v8::Script> script, v8::Local<v8::Context> context,
                  bool report_exceptions) {
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
   v8::Locker lock;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
 
   v8::Handle<v8::String> fun_name = v8::String::New("ProcessLine");
   v8::Handle<v8::Value> process_val =
@@ -427,9 +419,9 @@ v8::Handle<v8::String> ReadLine() {
 
   char* res;
   {
-#ifdef SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
     v8::Unlocker unlocker;
-#endif
+#endif  // ENABLE_DEBUGGER_SUPPORT
     res = fgets(buffer, kBufferSize, stdin);
   }
   if (res == NULL) {