Disable WebViewInteractiveTest.PointerLock which is flaky.

BUG=412086
TBR=lfg@chromium.org

Review URL: https://codereview.chromium.org/569083003

Cr-Commit-Position: refs/heads/master@{#294763}

chrome/browser/apps/web_view_interactive_browsertest.cc

@@ -550,8 +550,8 @@ class WebViewInteractiveTest
 // crbug.com/341876
 
 #if defined(OS_LINUX)
-
-IN_PROC_BROWSER_TEST_F(WebViewInteractiveTest, PointerLock) {
+// flaky http://crbug.com/412086
+IN_PROC_BROWSER_TEST_F(WebViewInteractiveTest, DISABLED_PointerLock) {
   SetupTest("web_view/pointer_lock",
             "/extensions/platform_apps/web_view/pointer_lock/guest.html");