Allow setting runtime-enabled features from a string.

public/web/WebRuntimeFeatures.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebRuntimeFeatures_h
 #define WebRuntimeFeatures_h
 
 #include "../platform/WebCommon.h"
+#include "../platform/WebString.h"
 
 namespace blink {
 
 // This class is used to enable runtime features of Blink.
 // Stable features are enabled by default.
 class WebRuntimeFeatures {
 public:
     BLINK_EXPORT static void enableExperimentalFeatures(bool);
     BLINK_EXPORT static void enableTestOnlyFeatures(bool);
 
+    // Enables a feature by its string identifier from
+    // RuntimeEnabledFeatures.in.
+    BLINK_EXPORT static void enableFeatureFromString(const WebString& name, bool enable);
+
     BLINK_EXPORT static void enableApplicationCache(bool);
 
     BLINK_EXPORT static void enableDatabase(bool);
 
     BLINK_EXPORT static void enableCompositedSelectionUpdate(bool);
     BLINK_EXPORT static bool isCompositedSelectionUpdateEnabled();
 
     BLINK_EXPORT static void enableDecodeToYUV(bool);
 
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);
@@ skipping 93 matching lines @@
 
     BLINK_EXPORT static void enablePushMessagingData(bool);
 
 private:
     WebRuntimeFeatures();
 };
 
 } // namespace blink
 
 #endif