gpu: Allow framebuffers with mixed samples if the hw supports it

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 358 matching lines @@
   ASSERT_TRUE(attachment != NULL);
   EXPECT_EQ(kWidth4, attachment->width());
   EXPECT_EQ(kHeight4, attachment->height());
   EXPECT_EQ(kSamples4, attachment->samples());
   EXPECT_EQ(kFormat4, attachment->internal_format());
   EXPECT_FALSE(attachment->cleared());
   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
             framebuffer_->IsPossiblyComplete(feature_info_.get()));
 
   // Change samples.
+  ASSERT_FALSE(
+      feature_info_->feature_flags().chromium_framebuffer_mixed_samples);
   renderbuffer_manager_->SetInfo(
       renderbuffer4, kDifferentSamples4, kFormat4, kWidth4, kHeight4);
   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE),
             framebuffer_->IsPossiblyComplete(feature_info_.get()));
   renderbuffer_manager_->SetInfo(
       renderbuffer4, kSamples4, kFormat4, kWidth4, kHeight4);
   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
             framebuffer_->IsPossiblyComplete(feature_info_.get()));
 
   // Check changing an attachment.
@@ skipping 923 matching lines @@
       renderbuffer_manager_->GetRenderbuffer(kRenderbufferClientId);
   ASSERT_TRUE(renderbuffer != NULL);
   framebuffer_->AttachRenderbuffer(GL_COLOR_ATTACHMENT1, renderbuffer);
   EXPECT_TRUE(framebuffer_->GetReadBufferAttachment());
 }
 
 }  // namespace gles2
 }  // namespace gpu