Update the expected URL for main.html of v2 app, used by remoting tests.

This should get the v2 launch test to start passing again.

BUG=424690

Review URL: https://codereview.chromium.org/703453003

Cr-Commit-Position: refs/heads/master@{#302544}

chrome/test/remoting/remote_desktop_browsertest.h

@@ -223,7 +223,14 @@ class RemoteDesktopBrowserTest : public extensions::PlatformAppBrowserTest {
 
   // Helper to construct the starting URL of the installed chromoting webapp.
   GURL Chromoting_Main_URL() {
-    return GURL("chrome-extension://" + ChromotingID() + "/main.html");
+    if (is_platform_app())
+      // The v2 remoting app recently (M38 at the latest) started adding a
+      // query-string parameter to the main extension page. So we'll create a
+      // different expected URL for it.
+      return GURL("chrome-extension://" + ChromotingID() +
+        "/main.html?isKioskSession=false");
+    else
+      return GURL("chrome-extension://" + ChromotingID() + "/main.html");
   }
 
   // Helper to retrieve the current URL in the active WebContents.