Move code in components/safe_browsing_db and chrome/browser/s_b/ under the safe_browsing namespace.

chrome/browser/safe_browsing/ping_manager_unittest.cc

Index: chrome/browser/safe_browsing/ping_manager_unittest.cc
diff --git a/chrome/browser/safe_browsing/ping_manager_unittest.cc b/chrome/browser/safe_browsing/ping_manager_unittest.cc
index aa2c7f5000b992eb5168f075df5849a4ac1b2c3a..029903b418149f02e5cb10b736b456489afcacb1 100644
--- a/chrome/browser/safe_browsing/ping_manager_unittest.cc
+++ b/chrome/browser/safe_browsing/ping_manager_unittest.cc
@@ -18,6 +18,8 @@ static const char kUrlPrefix[] = "https://prefix.com/foo";
 static const char kClient[] = "unittest";
 static const char kAppVer[] = "1.0";
 
+namespace safe_browsing {
+
 class SafeBrowsingPingManagerTest : public testing::Test {
  protected:
   std::string key_param_;
@@ -113,3 +115,5 @@ TEST_F(SafeBrowsingPingManagerTest, TestThreatDetailsUrl) {
           key_param_,
       pm.ThreatDetailsUrl().spec());
 }
+
+}  // namespace safe_browsing