Reverting based on discussions on #chromium with shess and rsleevi

chrome/browser/history/history_database.cc

Index: chrome/browser/history/history_database.cc
===================================================================
--- chrome/browser/history/history_database.cc	(revision 111432)
+++ chrome/browser/history/history_database.cc	(working copy)
@@ -14,7 +14,6 @@
 #include "base/rand_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/diagnostics/sqlite_diagnostics.h"
-#include "chrome/browser/history/history_field_trial.h"
 #include "chrome/browser/history/starred_url_database.h"
 #include "sql/transaction.h"
 
@@ -80,15 +79,11 @@
   // this is a NOP. Must be a power of 2 and a max of 8192.
   db_.set_page_size(4096);
 
-  if (HistoryFieldTrial::IsLowMemFieldTrial()) {
-    db_.set_cache_size(500);
-  } else {
-    // Increase the cache size. The page size, plus a little extra, times this
-    // value, tells us how much memory the cache will use maximum.
-    // 6000 * 4MB = 24MB
-    // TODO(brettw) scale this value to the amount of available memory.
-    db_.set_cache_size(6000);
-  }
+  // Increase the cache size. The page size, plus a little extra, times this
+  // value, tells us how much memory the cache will use maximum.
+  // 6000 * 4MB = 24MB
+  // TODO(brettw) scale this value to the amount of available memory.
+  db_.set_cache_size(6000);
 
   // Note that we don't set exclusive locking here. That's done by
   // BeginExclusiveMode below which is called later (we have to be in shared