Cleanup namespace usage in Source/web/*.h

Source/web/IndexedDBClientImpl.h

Index: Source/web/IndexedDBClientImpl.h
diff --git a/Source/web/IndexedDBClientImpl.h b/Source/web/IndexedDBClientImpl.h
index 1c68828488f40edcfa4baeb316614ee2612455d2..050b494b60a035a32af2e4d5d8a998b2c55bc5ad 100644
--- a/Source/web/IndexedDBClientImpl.h
+++ b/Source/web/IndexedDBClientImpl.h
@@ -32,16 +32,14 @@
 #include "modules/indexeddb/IndexedDBClient.h"
 
 namespace blink {
-class ExecutionContext;
-}
 
-namespace blink {
+class ExecutionContext;
 
-class IndexedDBClientImpl FINAL : public blink::IndexedDBClient {
+class IndexedDBClientImpl FINAL : public IndexedDBClient {
 public:
-    static blink::IndexedDBClient* create();
+    static IndexedDBClient* create();
 
-    virtual bool allowIndexedDB(blink::ExecutionContext*, const String& name) OVERRIDE;
+    virtual bool allowIndexedDB(ExecutionContext*, const String& name) OVERRIDE;
 
 private:
     IndexedDBClientImpl() { }