Remove unsafe mode to enable es3 api by default for WebGL2 and ES3 context

gpu/command_buffer/tests/gl_request_extension_unittest.cc

Index: gpu/command_buffer/tests/gl_request_extension_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_request_extension_unittest.cc b/gpu/command_buffer/tests/gl_request_extension_unittest.cc
index 6d440d2a1cdfd44b80e62acbdbb44151f755a0e9..d9c438d657b00b28ab79adf99363887e46209f9e 100644
--- a/gpu/command_buffer/tests/gl_request_extension_unittest.cc
+++ b/gpu/command_buffer/tests/gl_request_extension_unittest.cc
@@ -23,7 +23,6 @@ class RequestExtensionCHROMIUMTest
  protected:
   void SetUp() override {
     base::CommandLine command_line(*base::CommandLine::ForCurrentProcess());
-    command_line.AppendSwitch(switches::kEnableUnsafeES3APIs);
     GLManager::Options options;
     options.context_type = GetParam();
     gl_.InitializeWithCommandLine(options, command_line);