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 8ff4c7f32d14d7a318d4747efe8115547a205353..92f73c8e758a2eed8b60f5261d0f18b2614d3acc 100644
--- a/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
+++ b/third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.js
@@ -150,19 +150,16 @@ Bindings.CompilerScriptMapping = class {
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @param {number} lineNumber
    * @param {number} columnNumber
-   * @return {?SDK.DebuggerModel.Location}
+   * @return {!Array<!SDK.DebuggerModel.Location>}
    */
-  uiLocationToRawLocation(uiSourceCode, lineNumber, columnNumber) {
+  uiLocationToRawLocations(uiSourceCode, lineNumber, columnNumber) {
     var script = uiSourceCode[Bindings.CompilerScriptMapping._scriptSymbol];
-    if (!script)
-      return null;
-    var sourceMap = this._sourceMapManager.sourceMapForClient(script);
+    var sourceMap = script && 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);
+      return [];
+    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber)
+        .map(entry => this._debuggerModel.createRawLocation(script, entry.lineNumber, entry.columnNumber))
+        .filter(location => location);

[dgozman, 2017/05/02 21:36:45]

nit: location => !!location

   }
 
   /**
@@ -278,7 +275,7 @@ Bindings.CompilerScriptMapping = class {
     var sourceMap = script ? this._sourceMapManager.sourceMapForClient(script) : null;
     if (!sourceMap)
       return true;
-    return !!sourceMap.firstSourceLineMapping(uiSourceCode.url(), lineNumber);
+    return sourceMap.mappingsForLine(uiSourceCode.url(), lineNumber).length > 0;
   }
 
   dispose() {