Index: third_party/WebKit/Source/devtools/front_end/sdk/CSSModel.js |
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/CSSModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/CSSModel.js |
index 0a10c72cb5445a7852105235bdf23cceb0f928ca..303aa2ab9c7a8fb62e1824fde72aefbefde5e8b3 100644 |
--- a/third_party/WebKit/Source/devtools/front_end/sdk/CSSModel.js |
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/CSSModel.js |
@@ -212,7 +212,9 @@ WebInspector.CSSModel.prototype = { |
*/ |
_factoryForSourceMap: function(sourceMap) |
{ |
- var sourceExtensions = new Set(sourceMap.sourceURLs().map(url => WebInspector.ParsedURL.extractExtension(url))); |
+ var sourceExtensions = new Set(); |
+ for (var url of sourceMap.sourceURLs()) |
+ sourceExtensions.add(WebInspector.ParsedURL.extractExtension(url)); |
for (var runtimeExtension of self.runtime.extensions(WebInspector.SourceMapFactory)) { |
var supportedExtensions = new Set(runtimeExtension.descriptor()["extensions"]); |
if (supportedExtensions.containsAll(sourceExtensions)) |