[Origin Trials] Clarify the distinction between trials and features

third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h

Index: third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
diff --git a/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h b/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
index f09122facd9c6526b441fe0ffeb5446fc85d582b..a776a9043befa76b8909766e4ec6e9e94071e239 100644
--- a/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
+++ b/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
@@ -23,13 +23,13 @@ class WebTrialTokenValidator;
 // to check if the experimental feature should be enabled for the current
 // context.  This class is not for direct use by feature implementers.
 // Instead, the OriginTrials generated namespace provides a method for each
-// feature to check if it is enabled. Experimental features must be defined in
+// trial to check if it is enabled. Experimental features must be defined in
 // RuntimeEnabledFeatures.in, which is used to generate OriginTrials.h/cpp.
 //
-// Experimental features are defined by string names, provided by the
-// implementers. The framework does not maintain an enum or constant list for
-// feature names. Instead, the name provided by the feature implementation
-// is validated against any provided tokens.
+// Origin trials are defined by string names, provided by the implementers. The
+// framework does not maintain an enum or constant list for trial names.
+// Instead, the name provided by the feature implementation is validated against
+// any provided tokens.
 //
 // For more information, see https://github.com/jpchase/OriginTrials.
 class CORE_EXPORT OriginTrialContext final
@@ -66,9 +66,9 @@ class CORE_EXPORT OriginTrialContext final
   void addToken(const String& token);
   void addTokens(const Vector<String>& tokens);
 
-  // Returns true if the feature should be considered enabled for the current
-  // execution context.
-  bool isFeatureEnabled(const String& featureName);
+  // Returns true if the trial (and therefore the feature or features it
+  // controls) should be considered enabled for the current execution context.
+  bool isTrialEnabled(const String& trialName);
 
   // Installs JavaScript bindings for any features which should be enabled by
   // the current set of trial tokens. This method is idempotent; only features
@@ -84,7 +84,7 @@ class CORE_EXPORT OriginTrialContext final
 
   Member<ExecutionContext> m_host;
   Vector<String> m_tokens;
-  HashSet<String> m_enabledFeatures;
+  HashSet<String> m_enabledTrials;
   WebTrialTokenValidator* m_trialTokenValidator;
 };