Cast: Refactoring VideoSender to Clang format

This cl is pure style-targeted refactoring. 
No functional changes were made. 

BUG=339176

Review URL: https://codereview.chromium.org/138153005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249445 0039d316-1c4b-4281-b951-d872f2087c98
Reload the list of supervised users after a supervised user was imported.

BUG=341402
TEST=Import supervised user, then open overlay again and observe status "already on this device".

Review URL: https://codereview.chromium.org/145243006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249446 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249445
Allow custom paper with empty custom name. custom_display_name should be preset in json, but can be empty.
Added Dpi::IsValid().

Review URL: https://codereview.chromium.org/138613005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249447 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249447
Load an empty page to set up a renderer process for EmbeddedWorker tests

We used to load a test page (service_worker/index.html) that calls
'registerServiceWorker()', but it'll be kicking more background jobs
(like registration jobs) after more patches land, so this patch
changes the common test setup process to load an empty page which
has no (or much less) side effect.

This also removes test-only hacky method
ServiceWorkerContextCore::GetAllProviderHosts().

BUG=313530
TEST=content_browsertests:ServiceWorker\*

Review URL: https://codereview.chromium.org/141163022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249448 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249448
Update WebFrameClient implementations to maintain frame tree.

BUG=340002
R=boliu@chromium.org, creis@chromium.org, nasko@chromium.org, thestig@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=249168

Review URL: https://codereview.chromium.org/148353003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249449 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249449