Move remaining Blimp feature code to core.

blimp/client/core/contents/blimp_contents_view.h

Index: blimp/client/core/contents/blimp_contents_view.h
diff --git a/blimp/client/core/contents/blimp_contents_view.h b/blimp/client/core/contents/blimp_contents_view.h
index b94359f40e1c5011beabf298a68c27d69aa26aff..a9017a431e71d5e18519a9555772674941bf3a3e 100644
--- a/blimp/client/core/contents/blimp_contents_view.h
+++ b/blimp/client/core/contents/blimp_contents_view.h
@@ -8,8 +8,13 @@
 #include <memory>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace cc {
+class Layer;
+}  // namespace cc
+
 namespace blimp {
 namespace client {
 class BlimpContentsImpl;
@@ -17,7 +22,8 @@ class BlimpContentsImpl;
 class BlimpContentsView {
  public:
   static std::unique_ptr<BlimpContentsView> Create(
-      BlimpContentsImpl* blimp_contents);
+      BlimpContentsImpl* blimp_contents,
+      scoped_refptr<cc::Layer> contents_layer);
 
   virtual ~BlimpContentsView() {}