Revert of [Media Router] Remove binary messaging implementation.

Revert of [Media Router] Remove binary messaging implementation. (patchset #1 id:1 of https://codereview.chromium.org/2720273003/ )

Reason for revert:
Broke Android unittests

Original issue's description:
> [Media Router] Remove binary messaging implementation.
> 
> This removes the binary messaging implementation for Media Router from Android,
> as there are no plans to support it for Cast.
> 
> BUG=524128
> R=avayvod@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2720273003 .
> Cr-Commit-Position: refs/heads/master@{#453709}
> Committed: https://chromium.googlesource.com/chromium/src/+/ebdab4190ceb21a9ba4a5d8e719df9ab94b2716e

TBR=avayvod@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=524128

[mark a. foltz, 2017-02-28 22:30:23]

The CQ bit was checked by mfoltz@chromium.org

[mark a. foltz, 2017-02-28 22:30:23]

Created Revert of [Media Router] Remove binary messaging implementation.

[commit-bot: I haz the power, 2017-02-28 22:30:49]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-28 22:31:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-28 22:31:56]

Failed to apply patch for
chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java:
While running git apply --index -p1;
  error: patch failed:
chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java:325
  error:
chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java:
patch does not apply

Patch:      
chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
Index:
chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
diff --git
a/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
b/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
index
a4e96c4da74363269c4981d97656b72dc3bee6f7..9236349266cbd2af670f208acdfa62439eaae286
100644
---
a/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
+++
b/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
@@ -325,6 +325,23 @@
         }
 
         provider.sendStringMessage(routeId, message, callbackId);
+    }
+
+    /**
+     * Sends a binary message to the specified route.
+     * @param routeId The id of the route to send the message to.
+     * @param data The binary message to send.
+     * @param callbackId The id of the result callback tracked by the native
side.
+     */
+    @CalledByNative
+    public void sendBinaryMessage(String routeId, byte[] data, int callbackId)
{
+        MediaRouteProvider provider = mRouteIdsToProviders.get(routeId);
+        if (provider == null) {
+            nativeOnMessageSentResult(mNativeMediaRouterAndroid, false,
callbackId);
+            return;
+        }
+
+        provider.sendBinaryMessage(routeId, data, callbackId);
     }
 
     @VisibleForTesting