Allow constructing an EglBase from an existing shared EGLContext.

webrtc/sdk/android/api/org/webrtc/EglBase.java

Index: webrtc/sdk/android/api/org/webrtc/EglBase.java
diff --git a/webrtc/sdk/android/api/org/webrtc/EglBase.java b/webrtc/sdk/android/api/org/webrtc/EglBase.java
index 3e221c2f478d368cca0f1c3534dc15df8c55b740..619022c770eb32bfb29c5861e8b782c65cadb4c5 100644
--- a/webrtc/sdk/android/api/org/webrtc/EglBase.java
+++ b/webrtc/sdk/android/api/org/webrtc/EglBase.java
@@ -116,12 +116,30 @@ public abstract class EglBase {
   }
 
   /**
+   * Explicitly create a root EGl 1.0 context with the specified config attributes
+   * and shared context.
+   */
+  public static EglBase createEgl10(
+      javax.microedition.khronos.egl.EGLContext sharedContext, int[] configAttributes) {
+    return new EglBase10(new EglBase10.Context(sharedContext), configAttributes);
+  }
+
+  /**
    * Explicitly create a root EGl 1.4 context with the specified config attributes.
    */
   public static EglBase createEgl14(int[] configAttributes) {
     return new EglBase14(null /* shaderContext */, configAttributes);
   }
 
+  /**
+   * Explicitly create a root EGl 1.4 context with the specified config attributes
+   * and shared context.
+   */
+  public static EglBase createEgl14(
+      android.opengl.EGLContext sharedContext, int[] configAttributes) {
+    return new EglBase14(new EglBase14.Context(sharedContext), configAttributes);
+  }
+
   public abstract void createSurface(Surface surface);
 
   // Create EGLSurface from the Android SurfaceTexture.