Add null check to InfoBarLayout.setIsUsingBigIcon to avoid NPE.

chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java
index 2710eb04f0b2d72bcf1214d6db4688a430bc9d5d..ec47df7013cc64526ef5888f0f0bae07286b4013 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarLayout.java
@@ -251,6 +251,8 @@ public final class InfoBarLayout extends ViewGroup implements View.OnClickListen
      * Adjusts styling to account for the big icon layout.
      */
     public void setIsUsingBigIcon() {
+        if (mIconView == null) return;
+
         LayoutParams lp = (LayoutParams) mIconView.getLayoutParams();
         lp.width = mBigIconSize;
         lp.height = mBigIconSize;