Workaround for Intel 6xxx clear to 0/1 bug

gpu/command_buffer/service/gles2_cmd_decoder.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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 3165 matching lines @@
       group_->gpu_preferences().compile_shader_always_succeeds;
 
   // Take ownership of the context and surface. The surface can be replaced with
   // SetSurface.
   context_ = context;
   surface_ = surface;
 
   // Create GPU Tracer for timing values.
   gpu_tracer_.reset(new GPUTracer(this));
 
+  // Pass some workarounds to GLContext so that we can apply them in RealGLApi.
+  gl::GLWorkarounds gl_workarounds;
+  if (workarounds().clear_to_zero_or_one_broken) {
+    gl_workarounds.clear_to_zero_or_one_broken = true;
+  }
+  GetGLContext()->SetGLWorkarounds(gl_workarounds);
+
   if (workarounds().disable_timestamp_queries) {
     // Forcing time elapsed query for any GPU Timing Client forces it for all
     // clients in the context.
     GetGLContext()->CreateGPUTimingClient()->ForceTimeElapsedQuery();
   }
 
   // Save the loseContextWhenOutOfMemory context creation attribute.
   lose_context_when_out_of_memory_ =
       attrib_helper.lose_context_when_out_of_memory;
 
@@ skipping 16561 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu