Avoid exposing gl bindings through cc public API headers

cc/layer_updater.cc

Index: cc/layer_updater.cc
diff --git a/cc/layer_updater.cc b/cc/layer_updater.cc
index 2b0f77573be20dbe9d405db9ca1daa0bf20ffb92..2172952fc5568586d492f4d4aeebffd8298d778a 100644
--- a/cc/layer_updater.cc
+++ b/cc/layer_updater.cc
@@ -4,15 +4,20 @@
 
 #include "cc/layer_updater.h"
 
+#include "cc/prioritized_resource.h"
+
 namespace cc {
 
 LayerUpdater::Resource::Resource(scoped_ptr<PrioritizedResource> texture)
-    : m_texture(texture.Pass())
-{
+    : m_texture(texture.Pass()) {
+}
+
+void LayerUpdater::Resource::swapTextureWith(
+    scoped_ptr<PrioritizedResource>& texture) {
+  m_texture.swap(texture);
 }
 
-LayerUpdater::Resource::~Resource()
-{
+LayerUpdater::Resource::~Resource() {
 }
 
 }  // namespace cc