Replace API v23 calls.

talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java

Index: talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java
diff --git a/talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java b/talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java
index 175a00ed21b5660385733a42a1da90d8f8f3d6d5..e48019ad050ccc8fc5b19eb84e8d07589827bfda 100644
--- a/talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java
+++ b/talk/app/webrtc/java/android/org/webrtc/SurfaceTextureHelper.java
@@ -105,7 +105,7 @@ final class SurfaceTextureHelper {
   private boolean isQuitting = false;
 
   private SurfaceTextureHelper(EGLContext sharedContext, Handler handler, boolean isOwningThread) {
-    if (!handler.getLooper().isCurrentThread()) {
+    if (handler.getLooper().getThread() != Thread.currentThread()) {
       throw new IllegalStateException("SurfaceTextureHelper must be created on the handler thread");
     }
     this.handler = handler;
@@ -169,7 +169,7 @@ final class SurfaceTextureHelper {
    * onTextureFrameAvailable() after this function returns.
    */
   public void disconnect() {
-    if (handler.getLooper().isCurrentThread()) {
+    if (handler.getLooper().getThread() == Thread.currentThread()) {
       isQuitting = true;
       if (!isTextureInUse) {
         release();
@@ -190,7 +190,7 @@ final class SurfaceTextureHelper {
   }
 
   private void tryDeliverTextureFrame() {
-    if (!handler.getLooper().isCurrentThread()) {
+    if (handler.getLooper().getThread() != Thread.currentThread()) {
       throw new IllegalStateException("Wrong thread.");
     }
     if (isQuitting || !hasPendingTexture || isTextureInUse) {
@@ -211,7 +211,7 @@ final class SurfaceTextureHelper {
   }
 
   private void release() {
-    if (!handler.getLooper().isCurrentThread()) {
+    if (handler.getLooper().getThread() != Thread.currentThread()) {
       throw new IllegalStateException("Wrong thread.");
     }
     if (isTextureInUse || !isQuitting) {