Re-enable memlog tests on CrOS.

Flakiness should be fixed by https://chromium-review.googlesource.com/1023716.

Bug: 835826
Change-Id: I2f66c96439c10f0c6d115060006c2dc8523de103
Reviewed-on: https://chromium-review.googlesource.com/1028175Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553569}

chrome/browser/profiling_host/memlog_browsertest.cc

@@ -76,15 +76,9 @@ class MemlogBrowserTest : public InProcessBrowserTest,
   }
 };
 
-// Disabled due to https://crbug.com/835826.
-#if defined(OS_CHROMEOS)
-#define MAYBE_EndToEnd DISABLED_EndToEnd
-#else
-#define MAYBE_EndToEnd EndToEnd
-#endif
 // Ensure invocations via TracingController can generate a valid JSON file with
 // expected data.
-IN_PROC_BROWSER_TEST_P(MemlogBrowserTest, MAYBE_EndToEnd) {
+IN_PROC_BROWSER_TEST_P(MemlogBrowserTest, EndToEnd) {
   LOG(INFO) << "Memlog mode: " << static_cast<int>(GetParam().mode);
   LOG(INFO) << "Memlog stack mode: " << static_cast<int>(GetParam().stack_mode);
   LOG(INFO) << "Started via command line flag: "