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 a9f9b685813ec6ac46097a172b47474ea7a67857..3a7fbf46d7d50a2886dcc12502c92832468a87ca 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3183,6 +3183,13 @@ 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.