Don't bind to SsbService on low-end devices.

We only use SsbService to pass signed in account data for Icing. On
low-end devices, Icing is disabled, so we don't need this data.

BUG=750365

Change-Id: I00d9faa3a592de4b5471ec5226508facbd48c637
Reviewed-on: https://chromium-review.googlesource.com/592487
Commit-Queue: Maria Khomenko <mariakhomenko@chromium.org>
Reviewed-by: Benoit L <lizeb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491105}

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

@@ -802,11 +802,14 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         UpdateMenuItemHelper.getInstance().onStart();
         ChromeActivitySessionTracker.getInstance().onStartWithNative();
 
-        if (GSAState.getInstance(this).isGsaAvailable()) {
-            GSAAccountChangeListener.getInstance().connect();
-            createContextReporterIfNeeded();
-        } else {
-            ContextReporter.reportStatus(ContextReporter.STATUS_GSA_NOT_AVAILABLE);
+        if (!SysUtils.isLowEndDevice()) {
+            if (GSAState.getInstance(this).isGsaAvailable()) {
+                // GSA connection is not needed on low-end devices because Icing is disabled.
+                GSAAccountChangeListener.getInstance().connect();
+                createContextReporterIfNeeded();
+            } else {
+                ContextReporter.reportStatus(ContextReporter.STATUS_GSA_NOT_AVAILABLE);
+            }
         }
 
         // postDeferredStartupIfNeeded() is called in TabModelSelectorTabObsever#onLoadStopped(),
@@ -925,7 +928,7 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         if (tab != null && !hasWindowFocus()) tab.onActivityHidden();
         if (mAppMenuHandler != null) mAppMenuHandler.hideAppMenu();
 
-        if (GSAState.getInstance(this).isGsaAvailable()) {
+        if (GSAState.getInstance(this).isGsaAvailable() && !SysUtils.isLowEndDevice()) {
             GSAAccountChangeListener.getInstance().disconnect();
             if (mSyncStateChangedListener != null) {
                 ProfileSyncService syncService = ProfileSyncService.get();

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

@@ -16,6 +16,7 @@ import android.os.Process;
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.Callback;
 import org.chromium.base.ContextUtils;
+import org.chromium.base.SysUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
 
@@ -67,6 +68,7 @@ public class GSAAccountChangeListener {
     /** @return the instance of GSAAccountChangeListener. */
     public static GSAAccountChangeListener getInstance() {
         if (sInstance == null) {
+            assert !SysUtils.isLowEndDevice();
             Context context = ContextUtils.getApplicationContext();
             sInstance = new GSAAccountChangeListener(context);
         }