Remove obsolete metadata tag for media router.

Bug: 790766
Change-Id: I85fe845d3aa8b2584e7bd4877b7d80f1ee5ca3c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511878Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Auto-Submit: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823417}

chrome/android/expectations/monochrome_public_bundle.AndroidManifest.expected

@@ -836,7 +836,6 @@
     <meta-data android:name="com.samsung.android.sdk.multiwindow.penwindow.enable" android:value="true"/>
     <meta-data android:name="org.chromium.content.browser.NUM_PRIVILEGED_SERVICES" android:value="5"/>
     <meta-data android:name="org.chromium.content.browser.NUM_SANDBOXED_SERVICES" android:value="40"/>
-    <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS" android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
     <meta-data android:name="org.chromium.content.browser.SMART_CLIP_PROVIDER" android:value="org.chromium.content_public.browser.SmartClipProvider"/>
     <meta-data android:name="preloaded_fonts" android:resource="@array/chrome_preloaded_google_sans_fonts"/>
     <provider  # DIFF-ANCHOR: a5e78e63

chrome/android/expectations/trichrome_chrome_bundle.AndroidManifest.expected

@@ -790,7 +790,6 @@
     <meta-data android:name="com.samsung.android.sdk.multiwindow.penwindow.enable" android:value="true"/>
     <meta-data android:name="org.chromium.content.browser.NUM_PRIVILEGED_SERVICES" android:value="5"/>
     <meta-data android:name="org.chromium.content.browser.NUM_SANDBOXED_SERVICES" android:value="40"/>
-    <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS" android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
     <meta-data android:name="org.chromium.content.browser.SMART_CLIP_PROVIDER" android:value="org.chromium.content_public.browser.SmartClipProvider"/>
     <meta-data android:name="preloaded_fonts" android:resource="@array/chrome_preloaded_google_sans_fonts"/>
     <provider  # DIFF-ANCHOR: 97e158a1

chrome/android/java/AndroidManifest.xml

@@ -1166,18 +1166,6 @@ by a child template that "extends" this file.
         </activity>
         {% endif %}
 
-        {% block extra_application_definitions %}
-        <!-- Media route controllers to use for remote playback (cast).
-             This is here, rather than in code, since it varies between upstream and downstream,
-             yet we need this list of classes in the notification service, which belongs upstream
-             and doesn't run the downstream startup code. The Cast code will, for each media element,
-             choose the first MediaRouteController that can play it, so the order of the list can be important.
-             The most specific MediaRouteControllers should be listed first, followed by more generic ones.
-             The downstream manifest replaces this block, and hence replaces the list of media route
-             controllers with its own list. -->
-        <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS"
-            android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
-        {% endblock %}
       {% endmacro %}
       {% if not definitions_in_split %}
       {{ application_definitions() }}