Updated error message in PerformanceObserver.observe

third_party/WebKit/Source/core/timing/PerformanceObserver.cpp

Index: third_party/WebKit/Source/core/timing/PerformanceObserver.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceObserver.cpp b/third_party/WebKit/Source/core/timing/PerformanceObserver.cpp
index bbd92920cba7868293214fec83a66ae4715cc663..c3d7cac9d83ecec0fb07e0b96d547cadc281ea92 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceObserver.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceObserver.cpp
@@ -49,7 +49,7 @@ void PerformanceObserver::observe(const PerformanceObserverInit& observerInit,
   }
   if (entryTypes == PerformanceEntry::Invalid) {
     exceptionState.throwTypeError(
-        "A Performance Observer MUST have a non-empty entryTypes attribute.");
+        "A Performance Observer MUST have a valid entryTypes attribute.");

[Yoav Weiss, 2016/11/04 21:49:16]

Just to clarify, if one of the entries is valid, this doesn't throw, right?
If so, maybe the error thrown should reflect that? "A Performance Observer MUST
have at least one valid entryType in its entryTypes attribute."?

[sunjian, 2016/11/09 23:27:58]

Done.

     return;
   }
   m_filterOptions = entryTypes;