Don't create a LoFiBarPopupController if SnackbarManager is null

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index 5ea49624b1c24e05c7eebe91e0852087beaa5e28..194d0c228a1c94cd29c59daf5f8fe738ffbea76f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -566,8 +566,10 @@ public final class Tab implements ViewGroup.OnHierarchyChangeListener,
         mWindowAndroid = window;
         mLaunchType = type;
         if (mThemedApplicationContext != null) {
-            mLoFiBarPopupController = new LoFiBarPopupController(
-                    mThemedApplicationContext, getSnackbarManager());
+            if (getSnackbarManager() != null) {
+                mLoFiBarPopupController = new LoFiBarPopupController(
+                        mThemedApplicationContext, getSnackbarManager());
+            }
             Resources resources = mThemedApplicationContext.getResources();
             mIdealFaviconSize = resources.getDimensionPixelSize(R.dimen.default_favicon_size);
             mDefaultThemeColor = mIncognito