[Win] Draw the circular avatar programmatically rather than with a frame.

[Win] Draw the circular avatar programmatically rather than with a frame.

On Linux, the OS theme can change, which affects the default background
colour of the avatar bubble. This means that using a frame overlay to
display the profile avatar as an image is not actually feasible.

This also adds a small change to the ClipPath function of gfx::Canvas,
to allow controlling the anti-aliasing option.

BUG=372721
TEST=Start Chrome with --new-profile-management. Click on the avatar button. The avatar should still be displayed as a circle.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272854

[noms (inactive), 2014-05-22 17:11:08]

Hi,

We were displaying the profile avatar as a circle in the new avatar menu by
overlaying the square image with a frame. This turns out is less than optimal,
since Linux can change the background of bubbles.

This CL makes it so that we clip the image into a circle. Please take a look!

Dana: I've had to expose the doAntiAlias option from the SkCanvas, otherwise the
clipped circle was super pixelated.

[sky, 2014-05-22 19:33:20]

LGTM

[noms (inactive), 2014-05-23 20:55:46]

Dana: Ping! :)

[danakj, 2014-05-24 01:02:49]

sky is a better owner for ui/gfx/canvas and has already given his approval. I'll
remove myself.

[noms (inactive), 2014-05-25 14:28:49]

Understood, thanks! 

On 2014/05/24 01:02:49, danakj (OOO_back_june_6) wrote:
> sky is a better owner for ui/gfx/canvas and has already given his approval.
I'll
> remove myself.

[noms (inactive), 2014-05-25 14:28:54]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-05-25 14:29:06]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/290333012/60001

[commit-bot: I haz the power, 2014-05-25 16:20:24]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/7...)

[commit-bot: I haz the power, 2014-05-25 16:24:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-25 16:24:31]

Try jobs failed on following builders:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/7...)

[noms (inactive), 2014-05-26 15:48:53]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-05-26 15:50:46]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/290333012/60001

[commit-bot: I haz the power, 2014-05-26 16:43:53]

Change committed as 272854