Android: Move layout measure code from SurfaceViewRenderer to RendererCommon

webrtc/base/java/src/org/webrtc/ThreadUtils.java

Index: webrtc/base/java/src/org/webrtc/ThreadUtils.java
diff --git a/webrtc/base/java/src/org/webrtc/ThreadUtils.java b/webrtc/base/java/src/org/webrtc/ThreadUtils.java
index 4337fd0349c1638cb6f4a31914a283b71171fbbc..efe1fbd884507758ad54e7c270c3d9b2faf731d8 100644
--- a/webrtc/base/java/src/org/webrtc/ThreadUtils.java
+++ b/webrtc/base/java/src/org/webrtc/ThreadUtils.java
@@ -11,6 +11,7 @@
 package org.webrtc;
 
 import android.os.Handler;
+import android.os.Looper;
 import android.os.SystemClock;
 
 import java.util.concurrent.Callable;
@@ -39,6 +40,15 @@ public class ThreadUtils {
   }
 
   /**
+   * Throws exception if called from other than main thread.
+   */
+  public static void checkIsOnMainThread() {
+    if (Thread.currentThread() != Looper.getMainLooper().getThread()) {
+      throw new IllegalStateException("Not on main thread!");
+    }
+  }
+
+  /**
    * Utility interface to be used with executeUninterruptibly() to wait for blocking operations
    * to complete without getting interrupted..
    */