Workaround for Intel 6xxx clear to 0/1 bug

ui/gl/gl_context.cc

Index: ui/gl/gl_context.cc
diff --git a/ui/gl/gl_context.cc b/ui/gl/gl_context.cc
index 0f3b3561390189453f9c746bfb31a7a43f564546..29512e23fa03eb9dcfece5eec2d01ff94596f980 100644
--- a/ui/gl/gl_context.cc
+++ b/ui/gl/gl_context.cc
@@ -61,6 +61,7 @@ GLContext::~GLContext() {
 GLApi* GLContext::CreateGLApi(DriverGL* driver) {
   real_gl_api_ = new RealGLApi;
   real_gl_api_->Initialize(driver);
+  real_gl_api_->setGLWorkarounds(&gl_workarounds_);
   return real_gl_api_;
 }
 
@@ -210,6 +211,14 @@ void GLContext::SetCurrent(GLSurface* surface) {
   }
 }
 
+void GLContext::SetGLWorkarounds(const GLWorkarounds& workarounds) {
+  DCHECK(IsCurrent(nullptr));
+  gl_workarounds_ = workarounds;
+  if (real_gl_api_) {
+    real_gl_api_->setGLWorkarounds(&gl_workarounds_);
+  }
+}
+
 GLStateRestorer* GLContext::GetGLStateRestorer() {
   return state_restorer_.get();
 }