Remove gpu side LatencyInfo merging

This CL removes the LatecyInfo merging from the following path:

Compsitor to GPU:
CommandBufferProxyImpl::SetLatencyInfo()
-> (GpuCommandBufferMsg_SetLatencyInfo)
-> GpuCommandBufferStub::OnSetLatencyInfo()
-> ImageTransportHelper::SetLatencyInfo()
-> XXXImageTransportSurface:SetLatencyInfo()

After swap buffers:
XXXImageTransportSurface::SwapBuffers()
-> (GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params/
    GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params/
    GpuHostMsg_FrameDrawn)
-> RenderWidgetHostView

BUG=246034
TEST=unittests pass.
     Tested on Pixel. chrome://tracing shows correct InputLatency tracking for
     various inputs.

Review URL: https://codereview.chromium.org/123563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245260 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245260
Introduce content::TestLauncherDelegate.AdjustDefaultParallelJobs() to allow us to auto-disable parallelization for Ash browsertests.

BUG=286205

Review URL: https://codereview.chromium.org/132313006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245261 0039d316-1c4b-4281-b951-d872f2087c98
Remove Chrome Frame hacks from net tests.

BUG=316496,317432
R=wtc@chromium.org
CC=tzik@chromium.org

Review URL: https://codereview.chromium.org/138263003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245262 0039d316-1c4b-4281-b951-d872f2087c98
Update inbox_app

This CL updates the inbox_app in the Silk benchmark to use the newest
dynamics.js. The main difference is that we now do more work inside
requestAnimationFrame.

TBR=nduca

Review URL: https://codereview.chromium.org/140173002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245263 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245263