Rename infobar_close_button to btn_close.

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 a28886ed3546de0706aeaac544e9e4ceaba6c097..542014942e6b74d0dac8b166febac1a74769efce 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
@@ -157,7 +157,7 @@ public class InfoBarLayout extends ViewGroup implements View.OnClickListener {
         // Set up the close button. Apply padding so it has a big touch target.
         mCloseButton = new ImageButton(context);
         mCloseButton.setId(R.id.infobar_close_button);
-        mCloseButton.setImageResource(R.drawable.infobar_close_button);
+        mCloseButton.setImageResource(R.drawable.btn_close);
         TypedArray a = getContext().obtainStyledAttributes(
                 new int [] {R.attr.selectableItemBackground});
         Drawable closeButtonBackground = a.getDrawable(0);