Revert of DevTools: support resolving a UILocation to multiple raw script locations

third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js

Index: third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
diff --git a/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js b/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
index f153f2c750eb66a7f91e50d60589da58e8934d02..8ff4c7f32d14d7a318d4747efe8115547a205353 100644
--- a/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
+++ b/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
@@ -150,16 +150,19 @@
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {number} lineNumber
    * @param {number} columnNumber
-   * @return {!Array<!SDK.DebuggerModel.Location>}
-   */
-  uiLocationToRawLocations(uiSourceCode, lineNumber, columnNumber) {
+   * @return {?SDK.DebuggerModel.Location}
+   */
+  uiLocationToRawLocation(uiSourceCode, lineNumber, columnNumber) {
     var script = uiSourceCode[Bindings.CompilerScriptMapping._scriptSymbol];
-    var sourceMap = script && this._sourceMapManager.sourceMapForClient(script);
-    if (!sourceMap)
-      return [];
-    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber)
-        .map(entry => this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber))
-        .filter(location => !!location);
+    if (!script)
+      return null;
+    var sourceMap = this._sourceMapManager.sourceMapForClient(script);
+    if (!sourceMap)
+      return null;
+    var entry = sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);
+    if (!entry)
+      return null;
+    return this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber);
   }
 
   /**
@@ -275,7 +278,7 @@
     var sourceMap = script ? this._sourceMapManager.sourceMapForClient(script) : null;
     if (!sourceMap)
       return true;
-    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber).length > 0;
+    return !!sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);
   }
 
   dispose() {