[DevTools] Remove methods on Common.Event.

third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js
index 60fcf439d074939482ae349357084dac86767572..4c0c48503e590de0df05c357728aff32715beab0 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/DebuggerModel.js
@@ -411,8 +411,8 @@ SDK.DebuggerModel = class extends SDK.SDKModel {
     this._isPausing = false;
     this._debuggerPausedDetails = debuggerPausedDetails;
     if (this._debuggerPausedDetails) {
-      if (Runtime.experiments.isEnabled('emptySourceMapAutoStepping')) {
-        if (this.dispatchEventToListeners(SDK.DebuggerModel.Events.BeforeDebuggerPaused, this._debuggerPausedDetails))
+      if (Runtime.experiments.isEnabled('emptySourceMapAutoStepping') && this._beforePausedCallback) {
+        if (!this._beforePausedCallback.call(null, this._debuggerPausedDetails))
           return false;
       }
       this.dispatchEventToListeners(SDK.DebuggerModel.Events.DebuggerPaused, this._debuggerPausedDetails);
@@ -425,6 +425,13 @@ SDK.DebuggerModel = class extends SDK.SDKModel {
   }
 
   /**
+   * @param {?function(!SDK.DebuggerPausedDetails):boolean} callback
+   */
+  setBeforePausedCallback(callback) {
+    this._beforePausedCallback = callback;
+  }
+
+  /**
    * @param {!Array.<!Protocol.Debugger.CallFrame>} callFrames
    * @param {string} reason
    * @param {!Object|undefined} auxData
@@ -807,7 +814,6 @@ SDK.DebuggerModel.PauseOnExceptionsState = {
 SDK.DebuggerModel.Events = {
   DebuggerWasEnabled: Symbol('DebuggerWasEnabled'),
   DebuggerWasDisabled: Symbol('DebuggerWasDisabled'),
-  BeforeDebuggerPaused: Symbol('BeforeDebuggerPaused'),
   DebuggerPaused: Symbol('DebuggerPaused'),
   DebuggerResumed: Symbol('DebuggerResumed'),
   ParsedScriptSource: Symbol('ParsedScriptSource'),