android: Register Display lazily

ui/android/java/src/org/chromium/ui/display/DisplayAndroid.java

 // 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.
 
 package org.chromium.ui.display;
 
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Point;
 import android.os.Build;
@@ skipping 39 matching lines @@
         return DisplayAndroidManager.getInstance();
     }
 
     /**
      * Get the DisplayAndroid for this context. It's safe to call this with any type of context
      * including the Application. However to support multi-display, prefer to use the Activity
      * context if available, or obtain DisplayAndroid from WindowAndroid instead.
      */
     public static DisplayAndroid get(Context context) {
         Display display = DisplayAndroidManager.getDisplayFromContext(context);
-        int id = display.getDisplayId();
-        return getManager().getDisplayAndroid(id);
+        return getManager().getDisplayAndroid(display);
     }
 
     /**
      * @return Display height in physical pixels.
      */
     public int getDisplayHeight() {
         return mSize.y;
     }
 
     /**
@@ skipping 90 matching lines @@
                 o.onRotationChanged(mRotation);
             }
         }
     }
 
     private DisplayAndroidObserver[] getObservers() {
         // Makes a copy to allow concurrent edit.
         return mObservers.keySet().toArray(EMPTY_OBSERVER_ARRAY);
     }
 }