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

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index 75383a75843cf4a6292b01f945222a7227828f39..906c9cd63662c43bf6565f08b8acd53482d1ed2a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -76,7 +76,7 @@ import org.chromium.chrome.browser.download.DownloadManagerService;
 import org.chromium.chrome.browser.download.DownloadUtils;
 import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
 import org.chromium.chrome.browser.gsa.ContextReporter;
-import org.chromium.chrome.browser.gsa.GSAServiceClient;
+import org.chromium.chrome.browser.gsa.GSAAccountChangeListener;
 import org.chromium.chrome.browser.gsa.GSAState;
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.infobar.InfoBarContainer;
@@ -183,7 +183,6 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
     private TabContentManager mTabContentManager;
     private UmaSessionStats mUmaSessionStats;
     private ContextReporter mContextReporter;
-    protected GSAServiceClient mGSAServiceClient;
 
     private boolean mPartnerBrowserRefreshNeeded;
 
@@ -584,8 +583,7 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         ChromeActivitySessionTracker.getInstance().onStartWithNative();
 
         if (GSAState.getInstance(this).isGsaAvailable()) {
-            mGSAServiceClient = new GSAServiceClient(this);
-            mGSAServiceClient.connect();
+            GSAAccountChangeListener.getInstance().connect();
             createContextReporterIfNeeded();
         } else {
             ContextReporter.reportStatus(ContextReporter.STATUS_GSA_NOT_AVAILABLE);
@@ -687,9 +685,9 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         Tab tab = getActivityTab();
         if (tab != null && !hasWindowFocus()) tab.onActivityHidden();
         if (mAppMenuHandler != null) mAppMenuHandler.hideAppMenu();
-        if (mGSAServiceClient != null) {
-            mGSAServiceClient.disconnect();
-            mGSAServiceClient = null;
+
+        if (GSAState.getInstance(this).isGsaAvailable()) {
+            GSAAccountChangeListener.getInstance().disconnect();
             if (mSyncStateChangedListener != null) {
                 ProfileSyncService syncService = ProfileSyncService.get();
                 if (syncService != null) {