Get rid of the tryFast*alloc API.

public/platform/WebDeviceMotionData.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 54 matching lines @@
     bool hasAccelerationIncludingGravityZ : 1;
 
     bool hasRotationRateAlpha : 1;
     bool hasRotationRateBeta : 1;
     bool hasRotationRateGamma : 1;
 
     bool allAvailableSensorsAreActive : 1;
 };
 
 #if WEBKIT_IMPLEMENTATION
+#include "wtf/Assertions.h"
+
 COMPILE_ASSERT(sizeof(WebDeviceMotionData) == (10 * sizeof(double) + 2 * sizeof(char)), WebDeviceMotionData_has_wrong_size);
 #endif
 
 #pragma pack(pop)
 
 } // namespace WebKit
 
 #endif // WebDeviceMotionData_h