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Issue metadata

Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 2
Type: Bug



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Make sure we are not parallelizing the download of cached images

Project Member Reported by dah...@chromium.org, Jun 15 2017

Issue description

We need to make sure that we aren't inadvertently parallelizing images that are being pulled from the cache.
 
We recently found the image download bug is caused by history db. 

The possible cause is some one has a migration step on history db to copy every URL records to a temporary table and copy back, which may cause the history db explode.

This commit adds metrics for history db migration failures.
https://chromium.googlesource.com/chromium/src/+/ac7b23b2ea06f2826e7b2bca77475b2c11ce0973


Cc: dtrainor@chromium.org
Owner: xingliu@chromium.org
Status: Assigned (was: Untriaged)
This still need to follow the download code path for image cache.

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