Rename 'UseCounter::observe' to 'UseCounter::count'.

Source/core/page/ContentSecurityPolicy.cpp

Index: Source/core/page/ContentSecurityPolicy.cpp
diff --git a/Source/core/page/ContentSecurityPolicy.cpp b/Source/core/page/ContentSecurityPolicy.cpp
index 0e881f4a2e077cac83c93f460f0f9af7b04f87f3..851ad74f0af52799772230e38ea892b1692974d7 100644
--- a/Source/core/page/ContentSecurityPolicy.cpp
+++ b/Source/core/page/ContentSecurityPolicy.cpp
@@ -1459,9 +1459,9 @@ void ContentSecurityPolicy::didReceiveHeader(const String& header, HeaderType ty
     if (m_scriptExecutionContext->isDocument()) {
         Document* document = toDocument(m_scriptExecutionContext);
         if (type == PrefixedReport || type == PrefixedEnforce)
-            UseCounter::measureDeprecatedFeature(document, getUseCounterType(type));
+            UseCounter::countDeprecation(document, getUseCounterType(type));
         else
-            UseCounter::observe(document, getUseCounterType(type));
+            UseCounter::count(document, getUseCounterType(type));
     }
 
     // RFC2616, section 4.2 specifies that headers appearing multiple times can