[debug] mark more unused debug API as deprecated.

include/v8-debug.h

Index: include/v8-debug.h
diff --git a/include/v8-debug.h b/include/v8-debug.h
index 4046c4c0cfbc177234fc4d2d4e5680afc0c44c7e..7b19094404ccc549452734f82861a559a948473b 100644
--- a/include/v8-debug.h
+++ b/include/v8-debug.h
@@ -16,11 +16,10 @@ namespace v8 {
 enum DebugEvent {
   Break = 1,
   Exception = 2,
-  NewFunction = 3,
-  BeforeCompile = 4,
-  AfterCompile = 5,
-  CompileError = 6,
-  AsyncTaskEvent = 7,
+  BeforeCompile = 3,
+  AfterCompile = 4,
+  CompileError = 5,
+  AsyncTaskEvent = 6,
 };
 
 class V8_EXPORT Debug {
@@ -166,7 +165,8 @@ class V8_EXPORT Debug {
   static void CancelDebugBreak(Isolate* isolate);
 
   // Check if a debugger break is scheduled in the given isolate.
-  static bool CheckDebugBreak(Isolate* isolate);
+  V8_DEPRECATED("No longer supported",
+                static bool CheckDebugBreak(Isolate* isolate));
 
   // Message based interface. The message protocol is JSON.
   V8_DEPRECATED("No longer supported",
@@ -204,8 +204,9 @@ class V8_EXPORT Debug {
   /**
    * Returns a mirror object for the given object.
    */
-  static MaybeLocal<Value> GetMirror(Local<Context> context,
-                                     v8::Local<v8::Value> obj);
+  V8_DEPRECATED("No longer supported",
+                static MaybeLocal<Value> GetMirror(Local<Context> context,
+                                                   v8::Local<v8::Value> obj));
 
   /**
    * Makes V8 process all pending debug messages.
@@ -254,7 +255,9 @@ class V8_EXPORT Debug {
    * While in the debug context, this method returns the top-most non-debug
    * context, if it exists.
    */
-  static MaybeLocal<Context> GetDebuggedContext(Isolate* isolate);
+  V8_DEPRECATED(
+      "No longer supported",
+      static MaybeLocal<Context> GetDebuggedContext(Isolate* isolate));
 
   /**
    * Enable/disable LiveEdit functionality for the given Isolate