Update to Chromium revision 304f01a1 (#358063)

- Improve ordering of CefLoadHandler callbacks. OnLoadingStateChange will
  be called before and after all calls to OnLoadStart and OnLoadEnd.
  OnLoadStart/OnLoadEnd calls will occur as matching pairs
  (see http://crbug.com/539952#c2).
- Remove the |requesting_url| argument to CefGeolocationHandler::
  OnCancelGeolocationPermission. Clients can use the |request_id| argument
  to track this information themselves.
- Fix a crash when loading the PDF extension in multiple browsers with a
  custom CefRequestContext (issue #1757).

tests/unittests/cookie_unittest.cc

@@ -542,6 +542,11 @@ TEST(CookieTest, DomainCookieOnDisk) {
   EXPECT_TRUE(manager.get());
 
   TestDomainCookie(manager, event);
+
+  // The backing store will be closed on the DB thread after the CookieManager
+  // is destroyed.
+  manager = NULL;
+  WaitForDBThread();
 }
 
 // Test creation of a host cookie.
@@ -585,6 +590,11 @@ TEST(CookieTest, HostCookieOnDisk) {
   EXPECT_TRUE(manager.get());
 
   TestHostCookie(manager, event);
+
+  // The backing store will be closed on the DB thread after the CookieManager
+  // is destroyed.
+  manager = NULL;
+  WaitForDBThread();
 }
 
 // Test creation of multiple cookies.
@@ -628,6 +638,11 @@ TEST(CookieTest, MultipleCookiesOnDisk) {
   EXPECT_TRUE(manager.get());
 
   TestMultipleCookies(manager, event);
+
+  // The backing store will be closed on the DB thread after the CookieManager
+  // is destroyed.
+  manager = NULL;
+  WaitForDBThread();
 }
 
 TEST(CookieTest, AllCookiesGlobal) {
@@ -668,6 +683,11 @@ TEST(CookieTest, AllCookiesOnDisk) {
   EXPECT_TRUE(manager.get());
 
   TestAllCookies(manager, event);
+
+  // The backing store will be closed on the DB thread after the CookieManager
+  // is destroyed.
+  manager = NULL;
+  WaitForDBThread();
 }
 
 TEST(CookieTest, ChangeDirectoryGlobal) {