DevTools: fix jsdoc_validator bug for default parameter

third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java

Index: third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java
diff --git a/third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java b/third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java
index 9b3ba7698a5bd79aa8567f4c770339ccbd141dc5..0e42182cfc0b8d750bf3fb01a6924d7350caaec9 100644
--- a/third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java
+++ b/third_party/WebKit/Source/devtools/scripts/jsdoc_validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingValidationCheck.java
@@ -130,7 +130,10 @@ public class ContextTrackingValidationCheck extends ValidationCheck {
         Node parametersNode = NodeUtil.getFunctionParameters(functionNode);
         for (int i = 0, childCount = parametersNode.getChildCount(); i < childCount; ++i) {
             Node paramNode = parametersNode.getChildAtIndex(i);
-            String paramName = state.getContext().getNodeText(paramNode);
+            String paramText = state.getContext().getNodeText(paramNode);
+
+            // Handle default parameters (ES6)
+            String paramName = paramText.split("=")[0].trim();
             parameterNames.add(paramName);
         }
         return parameterNames;