DISABLE BrowserTest.PageZoom on Windows - flaky on XP starting circa r154109.

chrome/browser/ui/browser_browsertest.cc

Index: chrome/browser/ui/browser_browsertest.cc
diff --git a/chrome/browser/ui/browser_browsertest.cc b/chrome/browser/ui/browser_browsertest.cc
index 807acdafdf10147d6bde9ef083878ef140b01a62..aa544af47bb9e6afd3e6b97c22d173ad4df8b3fb 100644
--- a/chrome/browser/ui/browser_browsertest.cc
+++ b/chrome/browser/ui/browser_browsertest.cc
@@ -1226,7 +1226,14 @@ IN_PROC_BROWSER_TEST_F(BrowserTest,
   EXPECT_FALSE(command_updater->IsCommandEnabled(IDC_IMPORT_SETTINGS));
 }
 
-IN_PROC_BROWSER_TEST_F(BrowserTest, PageZoom) {
+#if defined(OS_WIN)
+// Flakes regularly on Windows XP
+// http://crbug.com/146040
+#define MAYBE_PageZoom DISABLED_PageZoom
+#else
+#define MAYBE_PageZoom PageZoom
+#endif
+IN_PROC_BROWSER_TEST_F(BrowserTest, MAYBE_PageZoom) {
   WebContents* contents = chrome::GetActiveWebContents(browser());
   bool enable_plus, enable_minus;