Disable DevToolsSanityTest.TestToolboxLoadedUndocked on Linux

chrome/browser/devtools/devtools_sanity_browsertest.cc

Index: chrome/browser/devtools/devtools_sanity_browsertest.cc
diff --git a/chrome/browser/devtools/devtools_sanity_browsertest.cc b/chrome/browser/devtools/devtools_sanity_browsertest.cc
index 8dbf90815b5e2c5e9c7926dda07c01739c66be58..75002d3c3f5387f780372ab9b0154e97a7030cf6 100644
--- a/chrome/browser/devtools/devtools_sanity_browsertest.cc
+++ b/chrome/browser/devtools/devtools_sanity_browsertest.cc
@@ -1251,7 +1251,13 @@ IN_PROC_BROWSER_TEST_F(DevToolsSanityTest, TestDevToolsExternalNavigation) {
 }
 
 // Tests that toolbox window is loaded when DevTools window is undocked.
-IN_PROC_BROWSER_TEST_F(DevToolsSanityTest, TestToolboxLoadedUndocked) {
+// Crashes on Linux only.  https://crbug.com/702641
+#if defined(OS_LINUX)
+#define MAYBE_TestToolboxLoadedUndocked DISABLED_TestToolboxLoadedUndocked
+#else
+#define MAYBE_TestToolboxLoadedUndocked TestToolboxLoadedUndocked
+#endif
+IN_PROC_BROWSER_TEST_F(DevToolsSanityTest, MAYBE_TestToolboxLoadedUndocked) {
   OpenDevToolsWindow(kDebuggerTestPage, false);
   ASSERT_TRUE(toolbox_web_contents());
   DevToolsWindow* on_self =