blimp: Hook up the layer holding the tab content into Chrome.

blimp/client/public/contents/blimp_contents.h

Index: blimp/client/public/contents/blimp_contents.h
diff --git a/blimp/client/public/contents/blimp_contents.h b/blimp/client/public/contents/blimp_contents.h
index c481696156b926ebaf8cf2d5c446e34f79a3450f..0b41f566ac2e2a0bac4b2b4fc162b66ab897ec6e 100644
--- a/blimp/client/public/contents/blimp_contents.h
+++ b/blimp/client/public/contents/blimp_contents.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "base/supports_user_data.h"
+#include "ui/gfx/native_widget_types.h"
 #include "url/gurl.h"
 
 #if defined(OS_ANDROID)
@@ -35,6 +36,9 @@ class BlimpContents : public base::SupportsUserData {
   virtual void AddObserver(BlimpContentsObserver* observer) = 0;
   virtual void RemoveObserver(BlimpContentsObserver* observer) = 0;
 
+  // Returns the native view that holds the contents of this tab.
+  virtual gfx::NativeView GetNativeView() = 0;
+
 #if defined(OS_ANDROID)
   // Returns a Java object of the type BlimpContents for the given
   // BlimpContents.