Also blocked by:
https://github.com/catapult-project/catapult/issues/1977

 Issue 795229  has been merged into this issue.

From Ned's comment #6 in the duped from bug:

> android_platform.LaunchApp('twitter')
> android_platform.Tap('id=....')  # -> this triggers CCT
> android_platform.WaitFor('id=...')  # Wait for CCT to appear on the screen
> alive_browsers = android_platform.GetAllRunningBrowserInstances()
> assert len(alive_browsers) == 1
> cct_browser = alive_browser[0]
> ... Do the rest of the user interaction with cct_browser ...

Note my current thinking is that rather than "GetAllRunningBrowserInstances", which could accidentally pick up some random browser we don't want, one would have a possible_browser instance (e.g. specifically for 'org.chromium.chrome') and do:

    browser = possible_browser.FindBrowserInstance()

to create the (Python) browser object from an already running browser instance on the device; rather than the current:

    browser = possible_browser.Create()  [1]

which both starts the instance and creates the corresponding browser object.

[1]: https://cs.chromium.org/chromium/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py?rcl=846f7660e7d5004afac6052a9d7905695bc1edb7&l=196

The following revision refers to this bug:
  https://chromium.googlesource.com/catapult/+/e7298f36f7912f2caa122086cfbe71734d04b73f

commit e7298f36f7912f2caa122086cfbe71734d04b73f
Author: Juan Antonio Navarro Perez <perezju@chromium.org>
Date: Mon Feb 12 17:38:41 2018

[Telemetry] Shared state for Android Go stories

Bug:  chromium:787834 
Bug:  chromium:784319 
Change-Id: I5fc2b452774d3dbf94f20e06ce53828b53520d6b
Reviewed-on: https://chromium-review.googlesource.com/908457
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>

[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/core/platform.py
[add] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/examples/benchmarks/android_go_benchmark.py
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/backends/chrome/android_browser_finder.py
[add] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/examples/.gitignore
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/backends/chrome/android_browser_backend.py
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/platform/platform_backend.py
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/platform/android_platform_backend.py
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/browser/browser.py
[modify] https://crrev.com/e7298f36f7912f2caa122086cfbe71734d04b73f/telemetry/telemetry/internal/backends/chrome_inspector/devtools_client_backend.py

The following revision refers to this bug:
  https://chromium.googlesource.com/catapult/+/aa735864568706c37d39c5a59e4d4253cc48334c

commit aa735864568706c37d39c5a59e4d4253cc48334c
Author: Juan Antonio Navarro Perez <perezju@chromium.org>
Date: Tue Feb 13 16:15:09 2018

[Telemetry] Clarify FindExistingBrowser docstring

State explicitly that a BrowserGoneException is raised by
FindExistingBrowser when no browser is found.

Bug:  chromium:784319 
Change-Id: Ic394269f5350a33e303e114a4b7d6cf59c53da53
Reviewed-on: https://chromium-review.googlesource.com/916222
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>

[modify] https://crrev.com/aa735864568706c37d39c5a59e4d4253cc48334c/telemetry/telemetry/internal/backends/chrome/android_browser_finder.py

This one is done. Follow up for remaining cleanup work at  issue 787834 .

🎉🎉🎉 Finishing this is a huge milestone!

woo hoo! Amazing! Thank you!!