gfx: De-templatize the gfx::Point and gfx::PointF classes.

gfx: De-templatize the gfx::Point and gfx::PointF classes.

This shrinks the android ChromeShell APK by 600 bytes, and improves
performance on compositor benchmarks.

Numbers can be found here https://crbug.com/407444#c15 but the summary
is this saves about 0.1ms cpu time on the JS_FULL_SCREEN_INVALIDATION
test in the thread_times.tough_compositor_cases test suite.

This also makes it easier to read and find functions in the Point and
PointF classes for developers.

R=sky
BUG=407444
Committed: https://crrev.com/76b13bfe17a7bf70ea6a2763e1f8c68aca794f66
Cr-Commit-Position: refs/heads/master@{#300283}

[danakj, 2014-10-17 00:41:33]

Patchset #2 (id:20001) has been deleted

[danakj, 2014-10-17 00:41:48]

Patchset #1 (id:1) has been deleted

[danakj, 2014-10-17 00:47:32]

Patchset #1 (id:40001) has been deleted

[danakj, 2014-10-17 00:47:39]

Patchset #1 (id:60001) has been deleted

[danakj, 2014-10-18 18:00:58]

Patchset #3 (id:120001) has been deleted

[sky, 2014-10-20 16:40:05]

LGTM

[danakj, 2014-10-20 16:41:19]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-10-20 16:42:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642343003/140001

[commit-bot: I haz the power, 2014-10-20 17:08:11]

Committed patchset #4 (id:140001)

[commit-bot: I haz the power, 2014-10-20 17:09:13]

Patchset 4 (id:??) landed as
https://crrev.com/76b13bfe17a7bf70ea6a2763e1f8c68aca794f66
Cr-Commit-Position: refs/heads/master@{#300283}