Merge V8 5.3.332.45.  DO NOT MERGE

Test: Manual

FPIIM-449

Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/include/v8-debug.h b/include/v8-debug.h
index e41df29..6520cbe 100644
--- a/include/v8-debug.h
+++ b/include/v8-debug.h
@@ -125,6 +125,8 @@
      */
     virtual ClientData* GetClientData() const = 0;
 
+    virtual Isolate* GetIsolate() const = 0;
+
     virtual ~EventDetails() {}
   };
 
@@ -259,6 +261,11 @@
   V8_DEPRECATED("Use version with an Isolate",
                 static Local<Context> GetDebugContext());
 
+  /**
+   * While in the debug context, this method returns the top-most non-debug
+   * context, if it exists.
+   */
+  static MaybeLocal<Context> GetDebuggedContext(Isolate* isolate);
 
   /**
    * Enable/disable LiveEdit functionality for the given Isolate