Returns the PNG representation that most closely matches |scale_factor|.
If |with_transparency| is true (1) any alpha transparency in the image
will be represented in the resulting PNG data. |pixel_width| and
|pixel_height| are the output representation size in pixel coordinates.
Returns a cef_binary_value_t containing the PNG image data on success or
NULL on failure.
Returns the PNG representation that most closely matches |scale_factor|. If |with_transparency| is true (1) any alpha transparency in the image will be represented in the resulting PNG data. |pixel_width| and |pixel_height| are the output representation size in pixel coordinates. Returns a cef_binary_value_t containing the PNG image data on success or NULL on failure.