Disable flaky OmniBoxViewTests.

BUG=751543
TBR=pkasting@chromium.org

Change-Id: I9e33b2f01f0c71bb7b032d16ec4e16443fadf0b2
Reviewed-on: https://chromium-review.googlesource.com/597853Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491359}

chrome/browser/ui/omnibox/omnibox_view_browsertest.cc

@@ -568,7 +568,13 @@ IN_PROC_BROWSER_TEST_F(OmniboxViewTest, DISABLED_BackspaceInKeywordMode) {
             UTF16ToUTF8(omnibox_view->GetText()));
 }
 
-IN_PROC_BROWSER_TEST_F(OmniboxViewTest, Escape) {
+// Flaky on Windows and Linux. http://crbug.com/751543
+#if defined(OS_WIN) || defined(OS_LINUX)
+#define MAYBE_Escape DISABLED_Escape
+#else
+#define MAYBE_Escape Escape
+#endif
+IN_PROC_BROWSER_TEST_F(OmniboxViewTest, MAYBE_Escape) {
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUIHistoryURL));
   chrome::FocusLocationBar(browser());
 
@@ -989,7 +995,13 @@ IN_PROC_BROWSER_TEST_F(OmniboxViewTest,
   EXPECT_FALSE(omnibox_view->model()->is_keyword_selected());
 }
 
-IN_PROC_BROWSER_TEST_F(OmniboxViewTest, AcceptKeywordBySpace) {
+// Flaky on Windows and Linux. http://crbug.com/751543
+#if defined(OS_WIN) || defined(OS_LINUX)
+#define MAYBE_AcceptKeywordBySpace DISABLED_AcceptKeywordBySpace
+#else
+#define MAYBE_AcceptKeywordBySpace AcceptKeywordBySpace
+#endif
+IN_PROC_BROWSER_TEST_F(OmniboxViewTest, MAYBE_AcceptKeywordBySpace) {
   OmniboxView* omnibox_view = NULL;
   ASSERT_NO_FATAL_FAILURE(GetOmniboxView(&omnibox_view));