Re-enable RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer

RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer was
disabled due to high flakiness on Android. However the bug report is older, and
the logs are all gone.

I cannot reproduce the flakes locally. Going to speculatively re-enable to see
if the flakes are gone. If not I'll at least have error stacks to go off of.

TBR=samans@chromium.org
TEST=RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer

Bug: 896466
Change-Id: Ifa2abecc2c429641a10519c866294edce5354820
Reviewed-on: https://chromium-review.googlesource.com/c/1359050Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613263}

content/browser/renderer_host/render_widget_host_view_browsertest.cc

@@ -224,16 +224,8 @@ IN_PROC_BROWSER_TEST_F(NoCompositingRenderWidgetHostViewBrowserTest,
   // dependent so we can't have a single generic test.
 }
 
-// Flaky on Android (especially on Marshmallow). crbug.com/896466
-#if defined(OS_ANDROID)
-#define MAYBE_CompositorWorksWhenReusingRenderer \
-  DISABLED_CompositorWorksWhenReusingRenderer
-#else
-#define MAYBE_CompositorWorksWhenReusingRenderer \
-  CompositorWorksWhenReusingRenderer
-#endif
 IN_PROC_BROWSER_TEST_F(RenderWidgetHostViewBrowserTestBase,
-                       MAYBE_CompositorWorksWhenReusingRenderer) {
+                       CompositorWorksWhenReusingRenderer) {
   ASSERT_TRUE(embedded_test_server()->Start());
   auto* web_contents = shell()->web_contents();
   // Load a page that draws new frames infinitely.