Move UrlBar background drawing to CC.

chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java
index 0057cea92b35677aa0a2ef24c68b857af2789a44..9a21d9e87bb7cff46f2d1a6000aeae88b6b3d262 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/ColorUtils.java
@@ -6,6 +6,9 @@ package org.chromium.chrome.browser.util;
 
 import android.graphics.Color;
 
+import org.chromium.chrome.browser.ntp.NewTabPage;
+import org.chromium.chrome.browser.tab.Tab;
+
 /**
  * Helper functions for working with colors.
  */
@@ -54,6 +57,18 @@ public class ColorUtils {
     }
 
     /**
+     * @return Alpha for the textbox given a Tab.
+     */
+    public static float getTextBoxAlphaForToolbarBackground(Tab tab) {
+        int color = tab.getThemeColor();
+        if (tab.getNativePage() instanceof NewTabPage) {
+            if (((NewTabPage) tab.getNativePage()).isLocationBarShownInNTP()) return 0f;
+        }
+        return shouldUseOpaqueTextboxBackground(color)
+                ? 1f : LOCATION_BAR_TRANSPARENT_BACKGROUND_ALPHA;
+    }
+
+    /**
      * Gets the background color for light theme progress bar.
      * @param toolbarColor The color of the toolbar.
      * @return The color of the progress bar in light theme, given the toolbar color.