Disable flaky test: FrameImplTest.ExecuteJavaScriptImmediate.

TBR=jamesr@chromium.org

Bug: 907859
Change-Id: Ia9b893ce42f89121c12f52dc7b4cddc4b97dc635
Reviewed-on: https://chromium-review.googlesource.com/c/1348066Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Anders Hartvoll Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610406}

webrunner/browser/frame_impl_browsertest.cc

@@ -389,7 +389,8 @@ fuchsia::mem::Buffer CreateBuffer(base::StringPiece data) {
 }
 
 // Test JS injection by using Javascript to trigger document navigation.
-IN_PROC_BROWSER_TEST_F(FrameImplTest, ExecuteJavaScriptImmediate) {
+// Flaky: https://crbug.com/907859
+IN_PROC_BROWSER_TEST_F(FrameImplTest, DISABLED_ExecuteJavaScriptImmediate) {
   chromium::web::FramePtr frame = CreateFrame();
 
   ASSERT_TRUE(embedded_test_server()->Start());