Implements Image Writer API for ChromeOS.

BUG=279327

Review URL: https://chromiumcodereview.appspot.com/23785007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224553 0039d316-1c4b-4281-b951-d872f2087c98
[Telemetry] Output GPU information before each test is run.

This is only output when -v is passed (like on the bots), so it should not
bother developers.

The output on my linux box looks like:

INFO:root:GPU device 0: 4318 3576
INFO:root:GPU Attributes:
INFO:root:	gl_version_string:
INFO:root:	optimus: False
INFO:root:	sandboxed: False
INFO:root:	finalized: False
INFO:root:	adapter_luid: 0.0
INFO:root:	driver_version: 304.88
INFO:root:	amd_switchable: False
INFO:root:	pixel_shader_version:
INFO:root:	gl_ws_version:
INFO:root:	lenovo_dcute: False
INFO:root:	can_lose_context: False
INFO:root:	driver_vendor: NVIDIA
INFO:root:	software_rendering: False
INFO:root:	gl_version:
INFO:root:	gl_ws_vendor:
INFO:root:	vertex_shader_version:
INFO:root:	initialization_time: 0.0
INFO:root:	gl_reset_notification_strategy: 0
INFO:root:	gl_ws_extensions:
INFO:root:	gl_renderer:
INFO:root:	driver_date:
INFO:root:	gl_vendor:
INFO:root:	gl_extensions:

BUG=

Review URL: https://chromiumcodereview.appspot.com/23835015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224554 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224554