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

gpu/command_buffer/service/gles2_cmd_decoder.h

Index: gpu/command_buffer/service/gles2_cmd_decoder.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 4aa1b23dbb2e9d7d4bda7a73c471e94c8182cfbe..997f8432905bdf3bc6696bfe9d404bcada94c351 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -115,12 +115,12 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
     initialized_ = true;
   }
 
-  bool unsafe_es3_apis_enabled() const {
-    return unsafe_es3_apis_enabled_;
+  bool es3_apis_enabled() const {
+    return es3_apis_enabled_;
   }
 
-  void set_unsafe_es3_apis_enabled(bool enabled) {
-    unsafe_es3_apis_enabled_ = enabled;
+  void set_es3_apis_enabled(bool enabled) {
+    es3_apis_enabled_ = enabled;
   }
 
   bool debug() const {
@@ -348,7 +348,7 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
   bool initialized_;
   bool debug_;
   bool log_commands_;
-  bool unsafe_es3_apis_enabled_;
+  bool es3_apis_enabled_;
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };