Disable flaky LazyBackgroundPageApiTest.WaitForRequest

TBR=rdevlin.cronin@chromium.org

Bug: 1006634
Change-Id: Id72dd4892c52e53b7a892f6c7e0671bea65a67cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1860043Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705741}

chrome/browser/extensions/lazy_background_page_apitest.cc

@@ -301,9 +301,10 @@ IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, WaitForView) {
   EXPECT_FALSE(IsBackgroundPageAlive(last_loaded_extension_id()));
 }
 
+// Flaky. https://crbug.com/1006634
 // Tests that the lazy background page stays alive until all network requests
 // are complete.
-IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, WaitForRequest) {
+IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, DISABLED_WaitForRequest) {
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   LazyBackgroundObserver page_complete;