Add a new GetInstance() method for remaining files with singleton classes under chrome/browser.

chrome/browser/safe_browsing/safe_browsing_service.cc

Index: chrome/browser/safe_browsing/safe_browsing_service.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_service.cc b/chrome/browser/safe_browsing/safe_browsing_service.cc
index c8e3c091f89dc3834c626e885aef8917ccb79ffb..62486248eddcace961df89aaf058932df6da217b 100644
--- a/chrome/browser/safe_browsing/safe_browsing_service.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_service.cc
@@ -6,8 +6,8 @@
 
 #include "base/callback.h"
 #include "base/command_line.h"
+#include "base/lazy_instance.h"
 #include "base/path_service.h"
-#include "base/singleton.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_thread.h"
@@ -62,13 +62,16 @@ class SafeBrowsingServiceFactoryImpl : public SafeBrowsingServiceFactory {
   }
 
  private:
-  friend struct DefaultSingletonTraits<SafeBrowsingServiceFactoryImpl>;
+  friend struct base::DefaultLazyInstanceTraits<SafeBrowsingServiceFactoryImpl>;
 
   SafeBrowsingServiceFactoryImpl() { }
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingServiceFactoryImpl);
 };
 
+static base::LazyInstance<SafeBrowsingServiceFactoryImpl>
+    g_safe_browsing_service_factory_impl(base::LINKER_INITIALIZED);
+
 struct SafeBrowsingService::WhiteListedEntry {
   int render_process_host_id;
   int render_view_id;
@@ -97,7 +100,7 @@ SafeBrowsingService::SafeBrowsingCheck::~SafeBrowsingCheck() {}
 /* static */
 SafeBrowsingService* SafeBrowsingService::CreateSafeBrowsingService() {
   if (!factory_)
-    factory_ = Singleton<SafeBrowsingServiceFactoryImpl>::get();
+    factory_ = g_safe_browsing_service_factory_impl.Pointer();
   return factory_->CreateSafeBrowsingService();
 }