Disable HostZoomMapBrowserTest.PageScaleIsOneChanged on Linux and Cros for flakiness

Bug: 1115597
Change-Id: Ibd17d29f636ac6b4b480d8e20658e51a3a31d650
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2409606Reviewed-by: James MacLean <wjmaclean@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809440}

chrome/browser/profiles/host_zoom_map_browsertest.cc

@@ -19,6 +19,7 @@
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
+#include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_impl.h"
 #include "chrome/browser/signin/signin_promo.h"
@@ -395,7 +396,13 @@ IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest,
   EXPECT_EQ(new_default_zoom_level, child_host_zoom_map->GetDefaultZoomLevel());
 }
 
-IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest, PageScaleIsOneChanged) {
+// TODO(1115597): Flaky on linux and cros.
+#if defined(OS_LINUX) || defined(OS_CHROMEOS)
+#define MAYBE_PageScaleIsOneChanged DISABLED_PageScaleIsOneChanged
+#else
+#define MAYBE_PageScaleIsOneChanged PageScaleIsOneChanged
+#endif
+IN_PROC_BROWSER_TEST_F(HostZoomMapBrowserTest, MAYBE_PageScaleIsOneChanged) {
   GURL test_url(url::kAboutBlankURL);
   std::string test_host(test_url.host());