Debugger: clean up debug events.

The debug event BreakForCommand is now deprecated, as it cannot happen any longer.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/1089893002

Cr-Commit-Position: refs/heads/master@{#28071}

include/v8-debug.h

@@ -22,7 +22,6 @@ enum DebugEvent {
   CompileError = 6,
   PromiseEvent = 7,
   AsyncTaskEvent = 8,
-  BreakForCommand = 9
 };
 
 

src/debug-debugger.js

@@ -22,8 +22,7 @@ Debug.DebugEvent = { Break: 1,
                      AfterCompile: 5,
                      CompileError: 6,
                      PromiseEvent: 7,
-                     AsyncTaskEvent: 8,
-                     BreakForCommand: 9 };
+                     AsyncTaskEvent: 8 };
 
 // Types of exceptions that can be broken upon.
 Debug.ExceptionBreak = { Caught : 0,

src/debug.cc

@@ -2823,21 +2823,18 @@ void Debug::NotifyMessageHandler(v8::DebugEvent event,
   bool sendEventMessage = false;
   switch (event) {
     case v8::Break:
-    case v8::BreakForCommand:
       sendEventMessage = !auto_continue;
       break;
-    case v8::Exception:
-      sendEventMessage = true;
-      break;
+    case v8::NewFunction:
     case v8::BeforeCompile:
+    case v8::CompileError:
+    case v8::PromiseEvent:
+    case v8::AsyncTaskEvent:
       break;
+    case v8::Exception:
     case v8::AfterCompile:
       sendEventMessage = true;
       break;
-    case v8::NewFunction:
-      break;
-    default:
-      UNREACHABLE();
   }
 
   // The debug command interrupt flag might have been set when the command was