Disable MediaGalleriesRead on windows.

chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc

Index: chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
diff --git a/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc b/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
index c47f6d8146e46cd2dc7ea2269fc684713e77754d..472540822f9abec8b229d5d7e121e20fdf045be9 100644
--- a/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
+++ b/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
@@ -361,8 +361,14 @@ IN_PROC_BROWSER_TEST_F(MediaGalleriesPlatformAppBrowserTest,
   ASSERT_TRUE(RunMediaGalleriesTest("no_galleries_copy_to")) << message_;
 }
 
+// Test is flaky on windows. See crbug.com/725354
+#if defined(OS_WIN)
+#define MAYBE_MediaGalleriesRead DISABLED_MediaGalleriesRead
+#else
+#define MAYBE_MediaGalleriesRead MediaGalleriesRead
+#endif
 IN_PROC_BROWSER_TEST_F(MediaGalleriesPlatformAppBrowserTest,
-                       MediaGalleriesRead) {
+                       MAYBE_MediaGalleriesRead) {
   RemoveAllGalleries();
   MakeSingleFakeGallery(NULL);
   base::ListValue custom_args;