Disable page_cycler.typical_25 to avoid timeout

We are getting timeouts on Android every time we run this. At present
the only way to disable on Android is to disable on anything with
a Linux host.

BUG=341843
TBR=tonyg@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/141773008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249722 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249722
Begin unification of memory profiling tools.

This is the first step towards the memory tools unification effort.
These core classes model the basic contract interfaces exposed to
frontends (CLI, web, ...) and going to be implemented by the backends,
abstracting OS-specific details of the memory tracing.
See the docs attached in the related bug for more details.

BUG=340294

Review URL: https://codereview.chromium.org/153853002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249723 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249723