Remove static/default interface method usage.

webrtc/sdk/android/src/java/org/webrtc/EglBase10.java

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 package org.webrtc;
 
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.SurfaceTexture;
 import android.view.Surface;
 import android.view.SurfaceHolder;
 
 import javax.microedition.khronos.egl.EGL10;
 import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.egl.EGLContext;
 import javax.microedition.khronos.egl.EGLDisplay;
 import javax.microedition.khronos.egl.EGLSurface;
 
 /**
  * Holds EGL state and utility methods for handling an egl 1.0 EGLContext, an EGLDisplay,
  * and an EGLSurface.
  */
-class EglBase10 implements EglBase {
+class EglBase10 extends EglBase {
   // This constant is taken from EGL14.EGL_CONTEXT_CLIENT_VERSION.
   private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
 
   private final EGL10 egl;
   private EGLContext eglContext;
   private EGLConfig eglConfig;
   private EGLDisplay eglDisplay;
   private EGLSurface eglSurface = EGL10.EGL_NO_SURFACE;
 
   // EGL wrapper for an actual EGLContext.
@@ skipping 264 matching lines @@
     synchronized (EglBase.lock) {
       eglContext = egl.eglCreateContext(eglDisplay, eglConfig, rootContext, contextAttributes);
     }
     if (eglContext == EGL10.EGL_NO_CONTEXT) {
       throw new RuntimeException(
           "Failed to create EGL context: 0x" + Integer.toHexString(egl.eglGetError()));
     }
     return eglContext;
   }
 }