Don't fire error messages if an install kills Chrome

Die silently if the Play Store starts installing an app
promoted by the webpage and Chrome dies in the background
before returning.  In this case, the infobar will disappear
before the user gets back anyway.

BUG=453170

Review URL: https://codereview.chromium.org/913593002

Cr-Commit-Position: refs/heads/master@{#315406}

chrome/android/java/src/org/chromium/chrome/browser/banners/AppBannerManager.java

@@ -176,8 +176,7 @@ public class AppBannerManager extends EmptyTabObserver {
             // Try installing the app.  If the installation was kicked off, return false to prevent
             // the infobar from disappearing.
             return !mTab.getWindowAndroid().showIntent(
-                    appData.installIntent(), createIntentCallback(appData),
-                    R.string.low_memory_error);
+                    appData.installIntent(), createIntentCallback(appData), null);
         }
     }
 
@@ -215,16 +214,7 @@ public class AppBannerManager extends EmptyTabObserver {
 
     @CalledByNative
     private void showAppDetails(AppData appData) {
-        WindowAndroid.IntentCallback emptyCallback = new WindowAndroid.IntentCallback() {
-            @Override
-            public void onIntentCompleted(WindowAndroid window, int resultCode,
-                    ContentResolver contentResolver, Intent data) {
-                // Do nothing.
-            }
-        };
-
-        mTab.getWindowAndroid().showIntent(
-                appData.detailsIntent(), emptyCallback, R.string.low_memory_error);
+        mTab.getWindowAndroid().showIntent(appData.detailsIntent(), null, null);
     }
 
     @CalledByNative