fix scroll callback for webview

    http://b/issue?id=3377268
    added check to see if state changed

Change-Id: Ic367144fb7bacb809e8acc7772298129d5c30388

1 files changed, 22 insertions, 3 deletions

diff --git a/src/com/android/browser/TabBar.java b/src/com/android/browser/TabBar.java
index b0057ed0..1ab02edd 100644
--- a/src/com/android/browser/TabBar.java
+++ b/src/com/android/browser/TabBar.java
@@ -230,6 +230,17 @@ public class TabBar extends LinearLayout
         }
     }
 
+    boolean showsTitleBarIndicator() {
+        Tab tab = mTabControl.getCurrentTab();
+        if (tab != null) {
+            TabView tv = mTabMap.get(tab);
+            if (tv != null) {
+                return tv.showsIndicator();
+            }
+        }
+        return false;
+    }
+
     // callback after fake titlebar is shown
     void onShowTitleBar() {
         showTitleBarIndicator(false);
@@ -251,10 +262,14 @@ public class TabBar extends LinearLayout
         if (mTabControl.getCurrentTab() != null
                 && !isLoading()) {
             if (visibleTitleHeight == 0) {
-                mUi.hideFakeTitleBar();
-                showTitleBarIndicator(true);
+                if (!showsTitleBarIndicator()) {
+                    mUi.hideFakeTitleBar();
+                    showTitleBarIndicator(true);
+                }
             } else {
-                showTitleBarIndicator(false);
+                if (showsTitleBarIndicator()) {
+                    showTitleBarIndicator(false);
+                }
             }
         }
         mVisibleTitleHeight = visibleTitleHeight;
@@ -336,6 +351,10 @@ public class TabBar extends LinearLayout
             }
         }
 
+        boolean showsIndicator() {
+            return (mIndicator.getVisibility() == View.VISIBLE);
+        }
+
         @Override
         public void onClick(View v) {
             if (v == mClose) {