android: Don't keep GSA alive if it supports account change broadcasts.

chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java

Index: chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java b/chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java
index 0524399e54361e0d0835fcf8bcf1905795cb0421..90a28e4cf0fa8e749f70be15605ba784b53738a1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/gsa/GSAServiceClient.java
@@ -17,6 +17,7 @@ import android.os.Messenger;
 import android.os.RemoteException;
 import android.util.Log;
 
+import org.chromium.base.Callback;
 import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.chrome.browser.ChromeApplication;
 
@@ -45,6 +46,7 @@ public class GSAServiceClient {
     private final GSAServiceConnection mConnection;
     private final GSAHelper mGsaHelper;
     private Context mContext;
+    private Callback<Bundle> mOnMessageReceived;
 
     /** Messenger for communicating with service. */
     private Messenger mService;
@@ -64,6 +66,7 @@ public class GSAServiceClient {
                 String account =
                         mGsaHelper.getGSAAccountFromState(bundle.getByteArray(KEY_GSA_STATE));
                 GSAState.getInstance(mContext.getApplicationContext()).setGsaAccount(account);
+                if (mOnMessageReceived != null) mOnMessageReceived.onResult(bundle);
             } else {
                 super.handleMessage(msg);
             }
@@ -72,11 +75,15 @@ public class GSAServiceClient {
 
     /**
      * Constructs an instance of this class.
+     *
+     * @param context Appliation context.
+     * @param onMessageReceived optional callback when a message is received.
      */
-    public GSAServiceClient(Context context) {
+    GSAServiceClient(Context context, Callback<Bundle> onMessageReceived) {
+        mContext = context;
+        mOnMessageReceived = onMessageReceived;
         mHandler = new IncomingHandler();
         mMessenger = new Messenger(mHandler);
-        mContext = context;
         mConnection = new GSAServiceConnection();
         mGsaHelper = ((ChromeApplication) mContext.getApplicationContext())
                 .createGsaHelper();
@@ -89,7 +96,7 @@ public class GSAServiceClient {
      * established.
      * @return Whether or not the connection to the service was established successfully.
      */
-    public boolean connect() {
+    boolean connect() {
         if (mService != null) Log.e(TAG, "Already connected.");
         Intent intent = new Intent(GSA_SERVICE).setPackage(GSAState.SEARCH_INTENT_PACKAGE);
         return mContext.bindService(
@@ -99,7 +106,7 @@ public class GSAServiceClient {
     /**
      * Disconnects from the service and resets the client's state.
      */
-    public void disconnect() {
+    void disconnect() {
         if (mService == null) return;
 
         mContext.unbindService(mConnection);
@@ -114,7 +121,7 @@ public class GSAServiceClient {
      * Indicates whether or not the client is currently connected to the service.
      * @return true if connected, false otherwise.
      */
-    public boolean isConnected() {
+    boolean isConnected() {
         return mService != null;
     }