DevTools: support uiLocationToRawLocations for CSS

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 347 matching lines @@
      * @param {number} lineNumber
      * @param {!SDK.SourceMapEntry} mapping
      * @return {number}
      */
     function lineComparator(lineNumber, mapping) {
       return lineNumber - mapping.sourceLineNumber;
     }
   }
 
   /**
+   * @param {string} sourceURL
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @return {!Array<!SDK.SourceMapEntry>}
+   */
+  findReverseEntries(sourceURL, lineNumber, columnNumber) {
+    var mappings = this._reversedMappings(sourceURL);
+    var endIndex = mappings.upperBound(
+        undefined, (unused, entry) => lineNumber - entry.sourceLineNumber || columnNumber - entry.sourceColumnNumber);
+    var startIndex = endIndex;
+    while (startIndex > 0 && mappings[startIndex - 1].sourceLineNumber === mappings[endIndex - 1].sourceLineNumber &&
+           mappings[startIndex - 1].sourceColumnNumber === mappings[endIndex - 1].sourceColumnNumber)
+      --startIndex;
+
+    return mappings.slice(startIndex, endIndex);
+  }
+
+  /**
    * @return {!Array<!SDK.SourceMapEntry>}
    */
   mappings() {
     if (this._mappings === null) {
       this._mappings = [];
       this._eachSection(this._parseMap.bind(this));
       this._json = null;
     }
     return /** @type {!Array<!SDK.SourceMapEntry>} */ (this._mappings);
   }
@@ skipping 224 matching lines @@
    * @param {?string} content
    * @param {?Array<!SDK.SourceMapEntry>} reverseMappings
    */
   constructor(content, reverseMappings) {
     this.content = content;
     this.reverseMappings = reverseMappings;
   }
 };
 
 SDK.TextSourceMap._sourcesListSymbol = Symbol('sourcesList');