Workaround for Intel 6xxx clear to 0/1 bug

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index 8a114b4fe05ffa443364cd19e0957ca2d92673fc..e1444caa4b077a565a265b1c557932f9f60c6759 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -17,6 +17,7 @@
 #include "gpu/command_buffer/service/texture_definition.h"
 #include "gpu/config/gpu_switches.h"
 #include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_context.h"
 #include "ui/gl/gl_fence.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
@@ -557,6 +558,13 @@ void FeatureInfo::InitializeFeatures() {
         GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
   }
 
+  // Pass some workarounds to ui/gl so that we can apply it in gl api.
+  gl::GLWorkarounds glWorkarounds;

[Zhenyao Mo, 2017/06/20 21:34:17]

gl_workarounds

[jiajia.qin, 2017/06/21 02:47:22]

Done.

+  if (workarounds_.clear_to_boundary_values_is_broken) {
+    glWorkarounds.clearToBoundaryValuesIsBroken = true;
+  }
+  gl::SetGLWorkarounds(glWorkarounds);
+
   // Check if we should support GL_OES_packed_depth_stencil and/or
   // GL_GOOGLE_depth_texture / GL_CHROMIUM_depth_texture.
   //