WebLayer: enable devtools on TelemetryActivity

Bug: 1045609
Change-Id: If91c5d1d796d038aa838b2421f63d841337de59c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067737
Commit-Queue: Evan Stade <estade@chromium.org>
Auto-Submit: Evan Stade <estade@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743365}

weblayer/shell/android/shell_apk/src/org/chromium/weblayer/shell/TelemetryActivity.java

@@ -94,15 +94,17 @@ public class TelemetryActivity extends FragmentActivity {
 
     private void createWebLayerAsync() {
         try {
-            WebLayer.loadAsync(getApplicationContext(), webLayer -> onWebLayerReady());
+            WebLayer.loadAsync(getApplicationContext(), webLayer -> onWebLayerReady(webLayer));
         } catch (UnsupportedVersionException e) {
             throw new RuntimeException("Failed to initialize WebLayer", e);
         }
     }
 
-    private void onWebLayerReady() {
+    private void onWebLayerReady(WebLayer webLayer) {
         if (mBrowser != null || isFinishing() || isDestroyed()) return;
 
+        webLayer.setRemoteDebuggingEnabled(true);
+
         mFragment = getOrCreateBrowserFragment();
         mBrowser = Browser.fromFragment(mFragment);
         mProfile = mBrowser.getProfile();