Allow native_viewport to create new native windows on demand on Android.

services/native_viewport/platform_viewport.h

Index: services/native_viewport/platform_viewport.h
diff --git a/services/native_viewport/platform_viewport.h b/services/native_viewport/platform_viewport.h
index 69bc4c7b2624f2017df531061a9b8e368eebdb77..04cc7ed2dd8325daf71028f87d8efa24b390bd31 100644
--- a/services/native_viewport/platform_viewport.h
+++ b/services/native_viewport/platform_viewport.h
@@ -15,6 +15,10 @@ namespace gfx {
 class Rect;
 }
 
+namespace mojo {
+class ApplicationImpl;
+}
+
 namespace native_viewport {
 
 // Encapsulation of platform-specific Viewport.
@@ -41,7 +45,8 @@ class PlatformViewport {
   virtual gfx::Size GetSize() = 0;
   virtual void SetBounds(const gfx::Rect& bounds) = 0;
 
-  static scoped_ptr<PlatformViewport> Create(Delegate* delegate);
+  static scoped_ptr<PlatformViewport> Create(mojo::ApplicationImpl* application,
+                                             Delegate* delegate);
 };
 
 }  // namespace native_viewport