The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aa5f0bcbe659641c6902d69a0ca33e8eb785533d

commit aa5f0bcbe659641c6902d69a0ca33e8eb785533d
Author: apacible <apacible@chromium.org>
Date: Fri Mar 25 01:19:12 2016

[Media Router WebUI] Handle header height changes.

Previously, there were two issues:
- The header height is expanded to 62px when the email is shown, but not reduced back to 52px when the email is later hidden.
- The positioning update is only done for the sink view.

This change includes:
- Removing the height styling from CSS and setting it explicitly in the header element.
- Wrapping everything under the first run flow and header in a div for positioning updating purposes.

BUG= 597414 ,  597411 

Review URL: https://codereview.chromium.org/1834573002

Cr-Commit-Position: refs/heads/master@{#383216}

[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.css
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/elements/media_router_header/media_router_header.css
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/elements/media_router_header/media_router_header.js
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/browser/resources/media_router/media_router_common.css
[modify] https://crrev.com/aa5f0bcbe659641c6902d69a0ca33e8eb785533d/chrome/test/data/webui/media_router/media_router_header_tests.js