API requests to fetch the hovercards data now include
`X-Analytics: preview=1` header so that HoverCard hovers are
easily distinguishable in Hive.
Bug: T129425
Change-Id: I69df51a627951c4373b3b7463ab5b2c0a129faa1
Linkpreview will try to fetch a text extract using the api and, if this
doesn't fail, show the extract as a drawer with a button "Continue to
article". If the query fails, it will redirect the user to the article
directly.
Bug: T113243
Depends-On: I6d8c5b80e70c3d8d1a92a70cc91e1b90d598cb0f
Change-Id: Idbaae9fe2decd89b73e623a25fbd39464c316fb2
For the work on T113243, the Popups extension should be structured in a
more flexible way. This is achieved with this change.
Following has changed:
* The main/core logic of Popups now lives in ext.popups.core to be shareable
between implementations
* The desktop specific logic lives in ext.popups.desktop now, the frontend init
code in ext.popups.desktopTarget and the desktop renderer in
ext.popups.renderer.desktopRenderer
This change doesn't change the functionality of Popups.
Change-Id: I72121e0a1e4b2952f85dc1bc8cf59d06b8d22f47
