Move UrlBar background drawing to CC.

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 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.
  */
 public class ColorUtils {
     private static final float CONTRAST_LIGHT_ITEM_THRESHOLD = 3f;
     private static final float LIGHTNESS_OPAQUE_BOX_THRESHOLD = 0.82f;
     private static final float LOCATION_BAR_TRANSPARENT_BACKGROUND_ALPHA = 0.2f;
     private static final float LIGHT_PROGRESSBAR_BACKGROUND_ALPHA = 0.5f;
 
     /** Percentage to darken a color by when setting the status bar color. */
@@ skipping 28 matching lines @@
 
     /**
      * @return The base color for the textbox given a toolbar background color.
      */
     public static int getTextBoxColorForToolbarBackground(int color) {
         if (shouldUseOpaqueTextboxBackground(color)) return Color.WHITE;
         return getColorWithOverlay(Color.WHITE, color, LOCATION_BAR_TRANSPARENT_BACKGROUND_ALPHA);
     }
 
     /**
+     * @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.
      */
     public static int getLightProgressbarBackground(int toolbarColor) {
         return getColorWithOverlay(Color.WHITE, toolbarColor, LIGHT_PROGRESSBAR_BACKGROUND_ALPHA);
     }
 
     private static int getColorWithOverlay(int baseColor, int overlayColor, float overlayAlpha) {
         return Color.rgb(
@@ skipping 39 matching lines @@
 
     /**
      * Returns an opaque version of the given color.
      * @param color Color for which an opaque version should be returned.
      * @return Opaque version of the given color.
      */
     public static int getOpaqueColor(int color) {
         return Color.rgb(Color.red(color), Color.green(color), Color.blue(color));
     }
 }