Revert "Mark two GPU process integration tests as flaky on Nexus9"

This reverts commit 18e3542b.

Bug: 1003481
Change-Id: I96a773fc1227b6b0fb002f99cd561397dcc04a9d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1834945Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Cr-Commit-Position: refs/heads/master@{#702087}

content/test/gpu/gpu_tests/test_expectations/gpu_process_expectations.txt

-# tags: [ linux win android ]
-# tags: [ nvidia ]
+# tags: [ linux win ]
 # results: [ Failure RetryOnFailure Skip ]
 
 crbug.com/257109 [ linux ] GpuProcess_video [ Failure ]
@@ -7,6 +6,3 @@ crbug.com/257109 [ linux ] GpuProcess_video [ Failure ]
 # Seems to have become flaky on Windows recently.
 crbug.com/700522 [ win ] GpuProcess_one_extra_workaround [ RetryOnFailure ]
 
-# The tests are flaky on Nexus9.
-crbug.com/1003481 [ android nvidia ] GpuProcess_disabling_workarounds_works [ RetryOnFailure ]
-crbug.com/1003481 [ android nvidia ] GpuProcess_one_extra_workaround [ Failure ]