Avoid exposing gl bindings through cc public API headers

cc/layer_tree_host.h

Index: cc/layer_tree_host.h
diff --git a/cc/layer_tree_host.h b/cc/layer_tree_host.h
index 95766e342c4fb8b72c3ae916122a6da4e712e756..774041b6837102bf36c5d55b7189a6067929b5f8 100644
--- a/cc/layer_tree_host.h
+++ b/cc/layer_tree_host.h
@@ -20,7 +20,6 @@
 #include "cc/layer_tree_settings.h"
 #include "cc/occlusion_tracker.h"
 #include "cc/output_surface.h"
-#include "cc/prioritized_resource_manager.h"
 #include "cc/proxy.h"
 #include "cc/rate_limiter.h"
 #include "cc/rendering_stats.h"
@@ -46,6 +45,8 @@ class Layer;
 class LayerTreeHostImpl;
 class LayerTreeHostImplClient;
 class PrioritizedResourceManager;
+class PrioritizedResource;
+class ResourceProvider;
 class ResourceUpdateQueue;
 class HeadsUpDisplayLayer;
 class Region;
@@ -57,7 +58,7 @@ struct CC_EXPORT RendererCapabilities {
     RendererCapabilities();
     ~RendererCapabilities();
 
-    GLenum bestTextureFormat;
+    unsigned bestTextureFormat;
     bool usingPartialSwap;
     bool usingAcceleratedPainting;
     bool usingSetVisibility;