Re-enable page cache.

Fix b: 2533219

Change-Id: Ida1122cd9a137a9d4caba8187bf48f9688889747
diff --git a/src/com/android/browser/BrowserSettings.java b/src/com/android/browser/BrowserSettings.java
index 39c2f1e..81701dc 100644
--- a/src/com/android/browser/BrowserSettings.java
+++ b/src/com/android/browser/BrowserSettings.java
@@ -257,14 +257,10 @@
         // the cost of one cached page is ~3M (measured using nytimes.com). For
         // low end devices, we only cache one page. For high end devices, we try
         // to cache more pages, currently choose 5.
-        //
-        // Note: the page cache is disabled on high-end devices due to an
-        // incompatibility with V8. TODO: re-enable the page cache once the
-        // problem with V8 is solved.
         ActivityManager am = (ActivityManager) ctx
                 .getSystemService(Context.ACTIVITY_SERVICE);
         if (am.getMemoryClass() > 16) {
-            pageCacheCapacity = 0;
+            pageCacheCapacity = 5;
         } else {
             pageCacheCapacity = 1;
         }