Add internals.isCSSPropertyUseCounted functionality

third_party/WebKit/Source/core/frame/UseCounter.cpp

Index: third_party/WebKit/Source/core/frame/UseCounter.cpp
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.cpp b/third_party/WebKit/Source/core/frame/UseCounter.cpp
index 15eb00c980c79d02610521b0b8ec5bf8a2a85790..538b5fcaf1981f9f94c50a8f5f7ad2acc24133bd 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.cpp
+++ b/third_party/WebKit/Source/core/frame/UseCounter.cpp
@@ -680,6 +680,27 @@ bool UseCounter::isCounted(Document& document, Feature feature)
     return host->useCounter().hasRecordedMeasurement(feature);
 }
 
+bool UseCounter::isCounted(CSSPropertyID unresolvedProperty)
+{
+    return m_CSSFeatureBits.quickGet(unresolvedProperty);
+}
+
+
+bool UseCounter::isCounted(Document& document, const String& string)
+{
+    Frame* frame = document.frame();
+    if (!frame)
+        return false;
+    FrameHost* host = frame->host();
+    if (!host)
+        return false;
+    CSSPropertyID propertyID = cssPropertyID(string);
+
+    if (propertyID != CSSPropertyInvalid)

[Timothy Loh, 2016/02/26 06:37:45]

better to rearrange this so the success case is at the very bottom. otherwise
right now the return statements from top to bottom are [fail, fail, success,
fail], which is weird.

[nainar, 2016/02/26 06:59:55]

Done.

+        return host->useCounter().isCounted(propertyID);
+    return false;
+}
+
 void UseCounter::count(const ExecutionContext* context, Feature feature)
 {
     if (!context)