Clear in-memory caches of renderers when rules change

chrome/browser/extensions/api/web_request/web_request_api_helpers.cc

 // Copyright (c) 2012 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/extensions/api/web_request/web_request_api_helpers.h"
 
 #include "base/bind.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/web_request/web_request_api.h"
+#include "chrome/browser/renderer_host/web_cache_manager.h"
 #include "chrome/common/url_constants.h"
+#include "content/public/browser/browser_thread.h"
 #include "net/base/net_log.h"
 #include "net/cookies/parsed_cookie.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_request.h"
 
 namespace extension_web_request_api_helpers {
 
 namespace {
 
 // A ParsedRequestCookie consists of the key and value of the cookie.
@@ skipping 27 matching lines @@
   // (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43949). Once we use a version
   // of gcc with this bug fixed, or the array is changed so this duplicate
   // entry is no longer required, this should be removed.
   ResourceType::LAST_TYPE,
 };
 
 COMPILE_ASSERT(
     arraysize(kResourceTypeStrings) == arraysize(kResourceTypeValues),
     keep_resource_types_in_sync);
 
+void ClearCacheOnNavigationOnUI() {
+  WebCacheManager::GetInstance()->ClearCacheOnNavigation();
+}
+
 }  // namespace
 
 RequestCookie::RequestCookie() {}
 RequestCookie::~RequestCookie() {}
 
 ResponseCookie::ResponseCookie() {}
 ResponseCookie::~ResponseCookie() {}
 
 RequestCookieModification::RequestCookieModification() {}
 RequestCookieModification::~RequestCookieModification() {}
@@ skipping 939 matching lines @@
 }
 
 bool CanExtensionAccessURL(const extensions::Extension* extension,
                            const GURL& url) {
   // about: URLs are not covered in host permissions, but are allowed anyway.
   return (url.SchemeIs(chrome::kAboutScheme) ||
           extension->HasHostPermission(url) ||
           url.GetOrigin() == extension->url());
 }
 
+void ClearCacheOnNavigation() {
+  if (content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)) {
+    ClearCacheOnNavigationOnUI();
+  } else {
+    content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+                                     base::Bind(&ClearCacheOnNavigationOnUI));
+  }
+}
+
 }  // namespace extension_web_request_api_helpers