Revert of android: Async setupConnection binder call

base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl

Index: base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl
diff --git a/base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl b/base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl
index fc2fd690bf3e9e9462484d77c0e8166a2878454a..32a534785eceec11003a1d7d9a6ba2397ba14485 100644
--- a/base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl
+++ b/base/android/java/src/org/chromium/base/process_launcher/IChildProcessService.aidl
@@ -6,17 +6,14 @@
 
 import android.os.Bundle;
 
-import org.chromium.base.process_launcher.ICallbackInt;
-
 interface IChildProcessService {
   // On the first call to this method, the service will record the calling PID
   // and return true. Subsequent calls will only return true if the calling PID
   // is the same as the recorded one.
   boolean bindToCaller();
 
-  // Sets up the initial IPC channel.
-  oneway void setupConnection(in Bundle args, ICallbackInt pidCallback,
-                              IBinder gpuCallback);
+  // Sets up the initial IPC channel and returns the pid of the child process.
+  int setupConnection(in Bundle args, IBinder callback);
 
   // Asks the child service to crash so that we can test the termination logic.
   oneway void crashIntentionallyForTesting();