[devtools] _parseMap in SourceMap.js does not strictly follow specs

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js b/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
index 94db41060ed8557660e384031c1394840f9207ea..58c6def49e424619adb62bfab9bcaacf1a62423e 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/SourceMap.js
@@ -457,9 +457,13 @@ WebInspector.TextSourceMap.prototype = {
             }
             sourceLineNumber += this._decodeVLQ(stringCharIterator);
             sourceColumnNumber += this._decodeVLQ(stringCharIterator);
-            if (!this._isSeparator(stringCharIterator.peek()))
-                nameIndex += this._decodeVLQ(stringCharIterator);
 
+            if (!stringCharIterator.hasNext() || this._isSeparator(stringCharIterator.peek())) {
+                this._mappings.push(new WebInspector.SourceMapEntry(lineNumber, columnNumber, sourceURL, sourceLineNumber, sourceColumnNumber));
+                continue;
+            }
+
+            nameIndex += this._decodeVLQ(stringCharIterator);
             this._mappings.push(new WebInspector.SourceMapEntry(lineNumber, columnNumber, sourceURL, sourceLineNumber, sourceColumnNumber, names[nameIndex]));
         }