Revert 263644 "[DevTools] Touch emulation in content."

Revert 263644 "[DevTools] Touch emulation in content."

Reason for revert: broke
http://build.chromium.org/p/chromium/builders/Linux%20x64/builds/63653/
by introducing two new static-initializers into the chrome binary:
# velocity_tracker.cc ui::(anonymous namespace)::LeastSquaresVelocityTrackerStrategy::HORIZON
# velocity_tracker.cc ui::(anonymous namespace)::ASSUME_POINTER_STOPPED_TIME

> [DevTools] Touch emulation in content.
> 
> When renderer requests touch emulation using mouse, host creates
> a TouchEmulator object and passes mouse, mouse wheel and keyboard events
> to emulator before sending them to renderer.
> 
> Emulator completely blocks mouse-related events, and instead generates
> touch events. Those touch events are handled over to gesture provider
> after being acked by renderer. Resulting gestures are sent to the renderer.
> 
> When shift is pressed, scroll gestures are converted to pinch gestures, so
> user can scale the page. This is required because multitouch is not yet
> supported by emulator.
> 
> BUG=337142
> 
> Review URL: https://codereview.chromium.org/138163016

TBR=dgozman@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=263647

[Ami GONE FROM CHROMIUM, 2014-04-14 17:27:46]

Committed patchset #1 manually as r263647 (tree was closed).

[jdduke (slow), 2014-04-14 17:47:26]

On 2014/04/14 17:27:46, Ami Fischman wrote:
> Committed patchset #1 manually as r263647 (tree was closed).

Ah, I can take care of the issue, thanks.

[jdduke (slow), 2014-04-15 04:47:47]

On 2014/04/14 17:47:26, jdduke wrote:
> On 2014/04/14 17:27:46, Ami Fischman wrote:
> > Committed patchset #1 manually as r263647 (tree was closed).
> 
> Ah, I can take care of the issue, thanks.

Fix has been stalled in the CQ because of other flakes, should land soon...
https://codereview.chromium.org/233433005/