[Telemetry] Fix memory.top_25 flake.

Clicking does not imply navigation and if we wait for ready state, a
subsequent wait-for-navigate may be invoked too late to wait for
navigation.

Instead, wait for navigate immediately and have it wait for ready state.

BUG=301884
TBR=qyearsley@chromium.org

Review URL: https://codereview.chromium.org/68173015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235472 0039d316-1c4b-4281-b951-d872f2087c98
Removes IPC from aura_demo

BUG=none
TEST=none
R=ben@chromium.org

Review URL: https://codereview.chromium.org/68263021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235473 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235473