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

chrome/browser/safe_browsing/safe_browsing_blocking_page.h

Index: chrome/browser/safe_browsing/safe_browsing_blocking_page.h
diff --git a/chrome/browser/safe_browsing/safe_browsing_blocking_page.h b/chrome/browser/safe_browsing/safe_browsing_blocking_page.h
index c2ab3710732b21bc021ab755372eae1fc0842814..bcc52d2e8d9553edb7bdc2ec73ea4e1fdd06dc31 100644
--- a/chrome/browser/safe_browsing/safe_browsing_blocking_page.h
+++ b/chrome/browser/safe_browsing/safe_browsing_blocking_page.h
@@ -40,13 +40,15 @@
 #include "content/public/browser/interstitial_page_delegate.h"
 #include "url/gurl.h"
 
-class ThreatDetails;
-class SafeBrowsingBlockingPageFactory;
-
 namespace base {
 class MessageLoop;
 }
 
+namespace safe_browsing {
+
+class SafeBrowsingBlockingPageFactory;
+class ThreatDetails;
+
 class SafeBrowsingBlockingPage : public SecurityInterstitialPage {
  public:
   typedef SafeBrowsingUIManager::UnsafeResource UnsafeResource;
@@ -204,4 +206,6 @@ class SafeBrowsingBlockingPageFactory {
       const SafeBrowsingBlockingPage::UnsafeResourceList& unsafe_resources) = 0;
 };
 
+}  // namespace safe_browsing
+
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_BLOCKING_PAGE_H_