Workaround for Intel 6xxx clear to 0/1 bug

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 4a8a74d80ba7a0a4f8a7395c5aed74bf1a0bbe3f..1c0e8a185c34e1a169ba4f2595e29720af8274ec 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -86,6 +86,7 @@
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_version_info.h"
+#include "ui/gl/gl_workarounds.h"
 #include "ui/gl/gpu_timing.h"
 
 #if defined(OS_MACOSX)
@@ -3186,6 +3187,13 @@ bool GLES2DecoderImpl::Initialize(
   // 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.