Disabling BaseAudioContextAutoplayTest on all platforms

The test has been flaky and we could not reproduce the time-out locally.
To suppress the warning/error, we should disable the test until
we figure out the solution.

Bug: 763550
Change-Id: Ia89f569e372d0ee94860f2a1c0ace7d44cd5eb6f
Reviewed-on: https://chromium-review.googlesource.com/664302Reviewed-by: Raymond Toy <rtoy@chromium.org>
Commit-Queue: Hongchan Choi <hongchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501460}

third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp

@@ -95,13 +95,9 @@ class BaseAudioContextTestPlatform : public TestingPlatformSupport {
 
 }  // anonymous namespace
 
-#if defined(OS_ANDROID)
-// Often times out on Android: https://crbug.com/752511.
+// Often times out on all platforms: https://crbug.com/763550.
 #define MAYBE_TEST_P(test_case_name, test_name) \
   TEST_P(test_case_name, DISABLED_##test_name)
-#else
-#define MAYBE_TEST_P TEST_P
-#endif
 
 class BaseAudioContextAutoplayTest
     : public ::testing::TestWithParam<AutoplayPolicy::Type> {