Add support for highlighting menu items

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java
index 4d9c22fd61696cbff715443d437381ea9c6aa390..34c19a4e3333c1bde8986e3053e44f4f32bc06e7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarLayout.java
@@ -26,6 +26,8 @@ import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.appmenu.AppMenuButtonHelper;
+import org.chromium.chrome.browser.appmenu.PulseDrawable;
+import org.chromium.chrome.browser.appmenu.PulseDrawableFactory;
 import org.chromium.chrome.browser.compositor.Invalidator;
 import org.chromium.chrome.browser.compositor.layouts.LayoutUpdateHost;
 import org.chromium.chrome.browser.fullscreen.BrowserStateBrowserControlsVisibilityDelegate;
@@ -77,6 +79,9 @@ public abstract class ToolbarLayout extends FrameLayout implements Toolbar {
 
     private boolean mFindInPageToolbarShowing;
 
+    protected boolean mHighlightingMenu;
+    private PulseDrawable mHighlightDrawable;
+
     protected boolean mShowMenuBadge;
     private AnimatorSet mMenuBadgeAnimatorSet;
     private boolean mIsMenuBadgeAnimationRunning;
@@ -653,6 +658,8 @@ public abstract class ToolbarLayout extends FrameLayout implements Toolbar {
      */
     public abstract LocationBar getLocationBar();
 
+    public abstract boolean useLightDrawables();
+
     /**
      * Navigates the current Tab back.
      * @return Whether or not the current Tab did go back.
@@ -691,6 +698,12 @@ public abstract class ToolbarLayout extends FrameLayout implements Toolbar {
     }
 
     @Override
+    public void setMenuButtonHighlight(boolean highlight) {
+        mHighlightingMenu = highlight;
+        setMenuButtonHighlightDrawable(mHighlightingMenu);
+    }
+
+    @Override
     public void showAppMenuUpdateBadge() {
         mShowMenuBadge = true;
     }
@@ -795,6 +808,29 @@ public abstract class ToolbarLayout extends FrameLayout implements Toolbar {
     }
 
     /**
+     * Sets the menu button's background depending on whether or not we are highlighting and whether
+     * or not we are using light or dark assets.
+     * @param highlighting     Whether or not the menu button should be highlighted.
+     */
+    protected void setMenuButtonHighlightDrawable(boolean highlighting) {
+        if (highlighting) {
+            if (mHighlightDrawable == null) {
+                mHighlightDrawable = PulseDrawableFactory.createCircle();
+                mHighlightDrawable.setInset(ApiCompatibilityUtils.getPaddingStart(mMenuButton),
+                        mMenuButton.getPaddingTop(),
+                        ApiCompatibilityUtils.getPaddingEnd(mMenuButton),
+                        mMenuButton.getPaddingBottom());
+            }
+            int colorRes = useLightDrawables() ? R.color.google_grey_100 : R.color.google_blue_500;
+            int color = ApiCompatibilityUtils.getColor(getResources(), colorRes);
+            mHighlightDrawable.setColor(color);
+            mMenuButtonWrapper.setBackground(mHighlightDrawable);
+        } else {
+            mMenuButtonWrapper.setBackground(null);
+        }
+    }
+
+    /**
      * Sets the content description for the menu button.
      * @param isUpdateBadgeVisible Whether the update menu badge is visible.
      */