Add support for origin trials in workers.

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 7f29843ee01b8eaed2237d98908e6813707d4147..012f028efa70c7c9cdb08a80119d738d9107c5ee 100644
--- a/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
+++ b/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
@@ -37,7 +37,11 @@ public:
     explicit OriginTrialContext(ExecutionContext*);
 
     static const char* supplementName();
-    static OriginTrialContext* from(ExecutionContext*);
+
+    // Returns the OriginTrialContext for a specific ExecutionContext. If
+    // |create| is false, this returns null if no OriginTrialContext exists
+    // yet for the ExecutionContext.
+    static OriginTrialContext* from(ExecutionContext*, bool create = true);

[kinuko, 2016/04/29 09:43:05]

nit: prefer enum over bool in general

[Marijn Kruisselbrink, 2016/05/02 23:19:31]

Changed it to an enum.

 
     // Parses an Origin-Trial header as specified in
     // https://jpchase.github.io/OriginTrials/#header into individual tokens.
@@ -46,8 +50,14 @@ public:
     static std::unique_ptr<Vector<String>> parseHeaderValue(const String& headerValue);
 
     static void addTokensFromHeader(ExecutionContext*, const String& headerValue);
+    static void addTokens(ExecutionContext*, const Vector<String>* tokens);
+
+    // Returns the trial tokens that are active in a specific ExecutionContext.
+    // Returns null if no tokens were added to the ExecutionContext.
+    static std::unique_ptr<Vector<String>> getTokens(ExecutionContext*);
 
     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. This method usually makes use of the token validator