Fix tests that were setting safebrowsing factories without unsetting them.

chrome/browser/prerender/prerender_browsertest.cc

Index: chrome/browser/prerender/prerender_browsertest.cc
diff --git a/chrome/browser/prerender/prerender_browsertest.cc b/chrome/browser/prerender/prerender_browsertest.cc
index 363f2f5fb1ce7adad3d647927785e2304751428f..572fd9b880a3357b2a031184d2eed72af557814a 100644
--- a/chrome/browser/prerender/prerender_browsertest.cc
+++ b/chrome/browser/prerender/prerender_browsertest.cc
@@ -726,6 +726,12 @@ class PrerenderBrowserTest : virtual public InProcessBrowserTest {
 #endif
   }
 
+  virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
+#if defined(FULL_SAFE_BROWSING)
+    SafeBrowsingService::RegisterFactory(NULL);
+#endif
+  }
+
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitchASCII(switches::kPrerenderMode,
                                     switches::kPrerenderModeSwitchValueEnabled);