[Media Router] Show user email in header if cloud sink is present.

chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html

Index: chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html
diff --git a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html
index 2df8bbd342301586cf634caa12ace39893ab23d0..a192e030185c38f0dee179392358aba7bc98e599 100644
--- a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html
+++ b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.html
@@ -52,6 +52,7 @@
     </template>
     <media-router-header id="container-header"
         class$="[[currentView_]]" view="[[currentView_]]"
+        email-text="[[computeEmailText_(showEmail, userEmail)]]"

[apacible, 2016/02/11 17:09:14]

userEmail isn't defined in media_router_container.js.

Since it's only used in the header, set it directly as a property in
media-router-header, and have media-router-container update whether or not to
show the email (showEmail).

[amp, 2016/02/11 21:21:24]

I'll try to do this, but I will need a little more context on polymer (I've just
been looking up small parts so far and don't have a good grasp of how everything
works together).

         heading-text="[[computeHeaderText_(currentView_, headerText)]]"
         arrow-drop-icon-disabled="[[computeIsLaunching_(currentLaunchingSinkId_)]]"
         tooltip="[[computeHeaderTooltip_(currentView_, headerTextTooltip)]]"
@@ -123,7 +124,7 @@
                   <template is="dom-if"
                       if="[[!computeSinkDomainHidden_(item)]]">
                     <span class="sink-domain">
-                      [[item.domain]]
+                      [[computeSinkDomainText_(item.domain)]]
                     </span>
                   </template>
                 </div>