code: func (c *Browser) GetHistograms(query string, delta bool) ([]*BrowserHistogram, error) {
  	var v BrowserGetHistogramsParams
  	v.Query = query
  	v.Delta = delta
  	return c.GetHistogramsWithParams(&v)
  }
docs: // GetHistograms - Get Chrome histograms.
  // query - Requested substring in name. Only histograms which have query as a substring in their name are extracted. An empty or absent query returns all histograms.
  // delta - If true, retrieve delta since last call.
  // Returns -  histograms - Histograms.