Move remaining Blimp feature code to core.

blimp/client/public/contents/blimp_contents.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BLIMP_CLIENT_PUBLIC_CONTENTS_BLIMP_CONTENTS_H_
 #define BLIMP_CLIENT_PUBLIC_CONTENTS_BLIMP_CONTENTS_H_
 
 #include "base/macros.h"
 #include "base/supports_user_data.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 21 matching lines @@
   // to this BlimpContents.
   virtual BlimpNavigationController& GetNavigationController() = 0;
 
   // Enables adding and removing observers to this BlimpContents.
   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;
 
+  // Will cause this BlimpContents and the remote contents to show and start or
+  // stop rendering content respectively.
+  virtual void Show() = 0;
+  virtual void Hide() = 0;
+
 #if defined(OS_ANDROID)
   // Returns a Java object of the type BlimpContents for the given
   // BlimpContents.
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaObject() = 0;
 #endif
 
  protected:
   BlimpContents() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BlimpContents);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_PUBLIC_CONTENTS_BLIMP_CONTENTS_H_