[Origin Trials] Install origin trial bindings on V8 context conditionally

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 8499a3fb90eacbf98302a97c1f3b1423dc2b3f24..16ba61e76ccfcd5b6c6e5cfafa01b79fb1054ded 100644
--- a/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
+++ b/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h
@@ -70,6 +70,13 @@ public:
     // to provide a message for features that are not enabled.
     bool isFeatureEnabled(const String& featureName, String* errorMessage);
 
+    // Installs JavaScript bindings for any features which should be enabled by
+    // the current set of trial tokens. This method is idempotent; only features
+    // which have been enabled since the last time it was run will be installed.
+    // If the V8 context for the host execution context has not been
+    // initialized, then this method will return without doing anything.
+    void initializePendingTrials();

[chasej, 2016/05/31 15:42:13]

Nit: maybe this should be named "initializePendingFeatures"? While the class is
OriginTrialContext, the implementation generally refers to features, not trials.

[iclelland, 2016/05/31 16:03:44]

Done.

+
     void setFeatureBindingsInstalled(const String& featureName);
     bool featureBindingsInstalled(const String& featureName);