Mark Pixel_WebGLReadPixelsTabSwitch as failing on Android Pixel 2 with SkiaRenderer Vulkan

Bug: 1049864
Change-Id: I3041a776006a53f4268a38a1786ab5b5c88bb4f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2043005Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Auto-Submit: Austin Eng <enga@chromium.org>
Cr-Commit-Position: refs/heads/master@{#739261}

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

 # tags: [ android chromeos highsierra linux mac mojave win ]
-# tags: [ android-chromium android-webview-instrumentation debug ]
+# tags: [ android-chromium android-webview-instrumentation android-not-webview debug ]
 # tags: [ skia-renderer no-skia-renderer ]
 # tags: [ use-gl no-use-gl ]
 # tags: [ use-vulkan no-use-vulkan ]
@@ -34,6 +34,9 @@ crbug.com/653538 [ win amd-0x6613 ] Pixel_GpuRasterization_BlueBox [ RetryOnFail
 [ android android-webview-instrumentation ] Pixel_Canvas2DTabSwitch [ Skip ]
 [ android android-webview-instrumentation ] Pixel_WebGLReadPixelsTabSwitch [ Skip ]
 
+# Failing on Android Pixel 2 with SkiaRenderer Vulkan
+crbug.com/1049864 [ android android-not-webview qualcomm-adreno-(tm)-540 skia-renderer use-vulkan ] Pixel_WebGLReadPixelsTabSwitch [ Failure ]
+
 # Tests running with SwiftShader are skipped on platforms where SwiftShader
 # isn't supported.
 [ mac ] Pixel_Canvas2DRedBox_SwiftShader [ Skip ]