GpuBenchmarking has grown to include functionality for testing both GPU and Input. This may be a bit of bikeshedding but I think it either needs
to be renamed to something more appropriate (e.g., ContentBenchmarking, BlinkPlatformBenchmarking) or we should split it into two separate benchmarking modules.

Here are the Input related methods:
  bool GestureSourceTypeSupported(int gesture_source_type);
  bool SmoothScrollBy(gin::Arguments* args);
  bool SmoothDrag(gin::Arguments* args);
  bool Swipe(gin::Arguments* args);
  bool ScrollBounce(gin::Arguments* args);
  bool PinchBy(gin::Arguments* args);
  bool Tap(gin::Arguments* args);

There are also some viewport related method which can be either input or GPU:
  float VisualViewportX();
  float VisualViewportY();
  float VisualViewportHeight();
  float VisualViewportWidth();
  float PageScaleFactor();