(in progress, see http://crrev.com/2633603002)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8cc0b4685ce52aac20f0c42b4938be23bd462872

commit 8cc0b4685ce52aac20f0c42b4938be23bd462872
Author: dominickn <dominickn@chromium.org>
Date: Wed Jan 18 01:21:28 2017

Disable app banners in incognito.

The add to homescreen menu item is disabled in incognito mode. For
consistency, this CL disables app banners when a site is opened in
incognito. Browser tests and instrumentation tests are added to ensure
the correct functionality.

BUG= 680778 

Review-Url: https://codereview.chromium.org/2633603002
Cr-Commit-Position: refs/heads/master@{#444223}

[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/browser/banners/app_banner_manager.cc
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/browser/banners/app_banner_manager_browsertest.cc
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/browser/banners/app_banner_metrics.cc
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/browser/installable/installable_logging.cc
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/chrome/browser/installable/installable_logging.h
[modify] https://crrev.com/8cc0b4685ce52aac20f0c42b4938be23bd462872/tools/metrics/histograms/histograms.xml

Verified in  57.0.2987.8

 Issue 691128  has been merged into this issue.