browser_test FindInPageControllerTest.FindLongString is flaky

It's flaky on Win7 Tests (dbg)(1).
This change disables it in debug Windows builds.

BUG=825341,823003
TBR=pkasting@chromium.org
NO-TRY=True

Change-Id: Ibb04812ca20081ec55cbc1bdbef01464ddb062f3
Reviewed-on: https://chromium-review.googlesource.com/978835Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545574}

chrome/browser/ui/find_bar/find_bar_host_browsertest.cc

@@ -423,8 +423,15 @@ IN_PROC_BROWSER_TEST_F(FindInPageControllerTest, MAYBE_LargePage) {
                                  kFwd, kIgnoreCase, NULL));
 }
 
+// https://crbug.com/825341: Flaky timeout on Win7 Tests (dbg)(1)
+#if defined(OS_WIN) && !defined(NDEBUG)
+#define MAYBE_FindLongString DISABLED_FindLongString
+#else
+#define MAYBE_FindLongString FindLongString
+#endif
+
 // Find a very long string in a large page.
-IN_PROC_BROWSER_TEST_F(FindInPageControllerTest, FindLongString) {
+IN_PROC_BROWSER_TEST_F(FindInPageControllerTest, MAYBE_FindLongString) {
   WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   ui_test_utils::NavigateToURL(browser(), GetURL("largepage.html"));