Fix size estimation for prerender in custom tabs

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
index 4b2d4ebcd10e8ed9cec8b173399ca6dd9f7582a1..a3cd9d92308fd0a280050a98af7381d9ce560f98 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
@@ -703,15 +703,16 @@ public class CustomTabsConnection extends ICustomTabsService.Stub {
         wm.getDefaultDisplay().getSize(screenSize);
         Resources resources = mApplication.getResources();
         int statusBarId = resources.getIdentifier("status_bar_height", "dimen", "android");
-        int navigationBarId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
         try {
             screenSize.y -=
                     resources.getDimensionPixelSize(R.dimen.custom_tabs_control_container_height);
             screenSize.y -= resources.getDimensionPixelSize(statusBarId);
-            screenSize.y -= resources.getDimensionPixelSize(navigationBarId);
         } catch (Resources.NotFoundException e) {
             // Nothing, this is just a best effort estimate.
         }
+        float density = resources.getDisplayMetrics().density;
+        screenSize.x /= density;
+        screenSize.y /= density;
         return screenSize;
     }