Enable gpu crash tests in content

content/public/test/browser_test_base.cc

Index: content/public/test/browser_test_base.cc
diff --git a/content/public/test/browser_test_base.cc b/content/public/test/browser_test_base.cc
index 1124adabbe2e87a488bc29f6c6a154667c3fae77..c1cfd7021dc0358692e0be0055d93c1f9a8c2a93 100644
--- a/content/public/test/browser_test_base.cc
+++ b/content/public/test/browser_test_base.cc
@@ -10,6 +10,7 @@
 #include "base/process_util.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
+#include "content/public/test/test_launcher_utils.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
@@ -56,6 +57,9 @@ BrowserTestBase::~BrowserTestBase() {
 void BrowserTestBase::SetUp() {
   CommandLine* command_line = CommandLine::ForCurrentProcess();
 
+  // common command line preparation for tests
+  PrepareBrowserCommandLineForTests(command_line);
+
   // The tests assume that file:// URIs can freely access other file:// URIs.
   command_line->AppendSwitch(switches::kAllowFileAccessFromFiles);