Remove WGC3D::isContextLost references from cc

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index a1184dd51f4cb6d79234a5c8b9ea62c97c1c3bf7..a0858a6cca8248e92f9a9082d980456342174db8 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -20,6 +20,7 @@
 #include "cc/output/filter_operation.h"
 #include "cc/output/filter_operations.h"
 #include "cc/resources/transferable_resource.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "ui/compositor/compositor_switches.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/compositor/layer_animator.h"
@@ -647,13 +648,6 @@ unsigned Layer::PrepareTexture() {
   return texture_->PrepareTexture();
 }
 
-WebKit::WebGraphicsContext3D* Layer::Context3d() {
-  DCHECK(texture_layer_.get());
-  if (texture_.get())
-    return texture_->HostContext3D();
-  return NULL;
-}
-
 bool Layer::PrepareTextureMailbox(
     cc::TextureMailbox* mailbox,
     scoped_ptr<cc::SingleReleaseCallback>* release_callback,