Move UrlBar background drawing to CC.

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/LayoutRenderHost.java

 // Copyright 2015 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.compositor.layouts;
 
 import android.graphics.Rect;
 
 import org.chromium.chrome.browser.compositor.layouts.components.LayoutTab;
 import org.chromium.ui.resources.ResourceManager;
@@ skipping 67 matching lines @@
      * @return The current visible viewport of the host (takes fullscreen into account).
      */
     Rect getVisibleViewport(Rect rect);
 
     /**
      * @return The background color of the toolbar.
      */
     int getTopControlsBackgroundColor();
 
     /**
+     * @return The alpha value of the textbox in the toolbar.
+     */
+    float getTopControlsUrlBarAlpha();
+
+    /**
      * @return Whether or not the toolbar is currently being faked.
      */
     boolean areTopControlsPermanentlyHidden();
 
     /**
      * @return The height of the top controls in pixels.
      */
     int getTopControlsHeightPixels();
 
     /**
      * @return The {@link ResourceManager}.
      */
     ResourceManager getResourceManager();
 
     /**
      * Called when something has changed in the Compositor rendered view system.
      */
     void invalidateAccessibilityProvider();
 }