Revert "Disable WebViewTest.Shim_testFindInMultipleWebViews on Windows"

This reverts commit 97ba6ddb.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Disable WebViewTest.Shim_testFindInMultipleWebViews on Windows
> 
> Due to flakiness.
> 
> TBR=ekaramad@chromium.org
> 
> Bug: 892085
> Change-Id: I96d8a3b14583c340abba18a725941b8ae0c1cf06
> Reviewed-on: https://chromium-review.googlesource.com/c/1261700
> Commit-Queue: Martin Šrámek <msramek@chromium.org>
> Reviewed-by: Martin Šrámek <msramek@chromium.org>
> Reviewed-by: Ehsan Karamad <ekaramad@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#596682}

TBR=msramek@chromium.org,ekaramad@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 892085
Change-Id: I8b417d49cef605a3dd734886332ac70b1f53d8d7
Reviewed-on: https://chromium-review.googlesource.com/c/1394869Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Commit-Queue: Daniel Murphy <dmurph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619763}

chrome/browser/apps/guest_view/web_view_browsertest.cc

@@ -3343,14 +3343,7 @@ IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_Shim_TestFindAPI_findupdate) {
   TestHelper("testFindAPI_findupdate", "web_view/shim", NO_TEST_SERVER);
 }
 
-// TODO(crbug.com/892085): Disabled on Windows due to flakiness. Re-enable.
-#if defined(OS_WIN)
-#define MAYBE_Shim_testFindInMultipleWebViews \
-  DISABLED_Shim_testFindInMultipleWebViews
-#else
-#define MAYBE_Shim_testFindInMultipleWebViews Shim_testFindInMultipleWebViews
-#endif
-IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_Shim_testFindInMultipleWebViews) {
+IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_testFindInMultipleWebViews) {
   TestHelper("testFindInMultipleWebViews", "web_view/shim", NO_TEST_SERVER);
 }