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

gpu/command_buffer/service/feature_info.h

Index: gpu/command_buffer/service/feature_info.h
diff --git a/gpu/command_buffer/service/feature_info.h b/gpu/command_buffer/service/feature_info.h
index a3f767146ad06f20901bc7791d99dff088ce4fd0..00ff7278b6b4114aeb803be5078783eff047eb25 100644
--- a/gpu/command_buffer/service/feature_info.h
+++ b/gpu/command_buffer/service/feature_info.h
@@ -147,7 +147,17 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
   void EnableES3Validators();
 
   bool IsES3Enabled() const {
-    return unsafe_es3_apis_enabled_;
+    return es3_apis_enabled_;
+  }
+
+  // TODO(yunchao): This is a workaround to make gpu_unittests pass.
+  // Will fix it later.
+  void SetES3APIsSwitch(bool enabled) {
+    enable_es3_apis_switch_ = enabled;
+  }
+
+  bool GetES3APIsSwitch() const {
+    return enable_es3_apis_switch_;
   }
 
   bool disable_shader_translator() const { return disable_shader_translator_; }
@@ -195,10 +205,8 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
   // Flags for Workarounds.
   const GpuDriverBugWorkarounds workarounds_;
 
-  // Whether the command line switch kEnableUnsafeES3APIs is passed in.
-  bool enable_unsafe_es3_apis_switch_;
-
-  bool unsafe_es3_apis_enabled_;
+  bool es3_apis_enabled_;
+  bool enable_es3_apis_switch_;
 
   bool ext_color_buffer_float_available_;
   bool oes_texture_float_linear_available_;