Devtools: Pretty print fix for CSS coverage decorations.

third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js

Index: third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js
diff --git a/third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js b/third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js
index fff83b1dbd5d7b5996a6295f93f7bbae49450319..7e8ff41bd67127fc89aafe55e27a3f78cad06e56 100644
--- a/third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js
+++ b/third_party/WebKit/Source/devtools/front_end/workspace/UISourceCode.js
@@ -447,11 +447,12 @@ Workspace.UISourceCode = class extends Common.Object {
 
   /**
    * @param {string} newWorkingCopy
+   * @param {!Workspace.UISourceCode.SourceMapping=} sourceMapping
    */
-  setWorkingCopy(newWorkingCopy) {
+  setWorkingCopy(newWorkingCopy, sourceMapping) {
     this._workingCopy = newWorkingCopy;
     delete this._workingCopyGetter;
-    this.dispatchEventToListeners(Workspace.UISourceCode.Events.WorkingCopyChanged);
+    this.dispatchEventToListeners(Workspace.UISourceCode.Events.WorkingCopyChanged, {sourceMapping: sourceMapping});
     this._project.workspace().dispatchEventToListeners(
         Workspace.Workspace.Events.WorkingCopyChanged, {uiSourceCode: this});
   }
@@ -949,3 +950,24 @@ Workspace.UISourceCodeMetadata = class {
     this.contentSize = contentSize;
   }
 };
+
+/**
+ * @interface
+ */
+Workspace.UISourceCode.SourceMapping = function() {};
+
+Workspace.UISourceCode.SourceMapping.prototype = {
+  /**
+   * @param {number} lineNumber
+   * @param {number=} columnNumber
+   * @return {!Array.<number>}
+   */
+  originalToFormatted: function(lineNumber, columnNumber) {},
+
+  /**
+   * @param {number} lineNumber
+   * @param {number=} columnNumber
+   * @return {!Array.<number>}
+   */
+  formattedToOriginal: function(lineNumber, columnNumber) {}
+};