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

gpu/command_buffer/service/framebuffer_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "gpu/command_buffer/service/error_state_mock.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/framebuffer_manager.h"
@@ skipping 100 matching lines @@
  public:
   static const GLuint kClient1Id = 1;
   static const GLuint kService1Id = 11;
 
   explicit FramebufferInfoTestBase(ContextType context_type)
       : context_type_(context_type),
         manager_(kMaxDrawBuffers,
                  kMaxColorAttachments,
                  new FramebufferCompletenessCache),
         feature_info_(new FeatureInfo()) {
+    feature_info_->SetES3APIsSwitch(false);
     texture_manager_.reset(new TextureManager(
         nullptr, feature_info_.get(), kMaxTextureSize, kMaxCubemapSize,
         kMaxRectangleTextureSize, kMax3DTextureSize, kMaxArrayTextureLayers,
         kUseDefaultTextures, nullptr));
     renderbuffer_manager_.reset(new RenderbufferManager(nullptr,
                                                         kMaxRenderbufferSize,
                                                         kMaxSamples,
                                                         feature_info_.get()));
   }
   ~FramebufferInfoTestBase() override {
@@ skipping 1521 matching lines @@
       renderbuffer_manager_->GetRenderbuffer(kRenderbufferClientId);
   ASSERT_TRUE(renderbuffer != nullptr);
   framebuffer_->AttachRenderbuffer(GL_COLOR_ATTACHMENT1, renderbuffer);
   EXPECT_TRUE(framebuffer_->GetReadBufferAttachment());
 }
 
 }  // namespace gles2
 }  // namespace gpu