Update enabled state of the NTP search box whenever its alpha changes.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
index 8bd4ccfb61958b036c3dc2f9b902d52138bcca24..56319bd06065349ae9f4882f67ce8c61918d226c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
@@ -525,9 +525,6 @@ public class NewTabPageView extends FrameLayout
         // wrong page.
         if (!mManager.isCurrentPage()) return;
 
-        // Disable the search box contents if it is the process of being animated away.
-        ViewUtils.setEnabledRecursive(mSearchBoxView, mSearchBoxView.getAlpha() == 1.0f);
-
         if (mSearchBoxScrollListener != null) {
             mSearchBoxScrollListener.onNtpScrollChanged(getToolbarTransitionPercentage());
         }
@@ -810,6 +807,9 @@ public class NewTabPageView extends FrameLayout
      */
     public void setSearchBoxAlpha(float alpha) {
         mSearchBoxView.setAlpha(alpha);
+
+        // Disable the search box contents if it is the process of being animated away.
+        ViewUtils.setEnabledRecursive(mSearchBoxView, mSearchBoxView.getAlpha() == 1.0f);
     }
 
     /**