Create a new SimpleRandom class to be used for generating the fake packet
loss random numbers for quic connections.  (test-only)

Merge internal change: 53514452

BUG=

Review URL: https://codereview.chromium.org/25396002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226138 0039d316-1c4b-4281-b951-d872f2087c98
Temporarily add OVERRIDE to width()/height() in TestWebGraphicsContext3D

This is needed to land https://codereview.chromium.org/25450002 in blink. After
width()/height() are removed from WGC3D, TestWebGraphicsContext3D::width()
overrides FakeWebGraphicsContext3D::width() which is in chromium land, and the
clang plugin complains if it's not OVERRIDE then.

BUG=181120
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/25451002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226139 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226139