Add policies to control the disk cache size.

chrome/browser/ui/browser.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 2428 matching lines @@
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kEnableHyperlinkAuditing,
                              true,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kEnableReferrers,
                              true,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kClearPluginLSODataEnabled,
                              true,
                              PrefService::UNSYNCABLE_PREF);
+
+  // Initialize the disk cache prefs.
+  prefs->RegisterFilePathPref(prefs::kDiskCacheDir,
+                              FilePath(),
+                              PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterIntegerPref(prefs::kDiskCacheSize,
+                             0,
+                             PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterIntegerPref(prefs::kMediaCacheSize,
+                             0,
+                             PrefService::UNSYNCABLE_PREF);
 }
 
 // static
 bool Browser::RunUnloadEventsHelper(TabContents* contents) {
   // If the TabContents is not connected yet, then there's no unload
   // handler we can fire even if the TabContents has an unload listener.
   // One case where we hit this is in a tab that has an infinite loop
   // before load.
   if (contents->NeedToFireBeforeUnload()) {
     // If the page has unload listeners, then we tell the renderer to fire
@@ skipping 3050 matching lines @@
 }
 
 void Browser::UpdateFullscreenExitBubbleContent() {
   GURL url;
   if (fullscreened_tab_)
     url = fullscreened_tab_->tab_contents()->GetURL();
 
   window_->UpdateFullscreenExitBubbleContent(
       url, GetFullscreenExitBubbleType());
 }