Cleanup namespace usage in Source/core/{dom/* & fileapi/*}

Source/core/fileapi/File.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 80 matching lines @@
     RefPtrWillBeRawPtr<File> file = adoptRefWillBeNoop(new File(path, File::AllContentTypes, File::IsUserVisible));
     file->m_relativePath = relativePath;
     return file.release();
 }
 
 File::File(const String& path, ContentTypeLookupPolicy policy, UserVisibility userVisibility)
     : Blob(BlobDataHandle::create(createBlobDataForFile(path, policy), -1))
     , m_hasBackingFile(true)
     , m_userVisibility(userVisibility)
     , m_path(path)
-    , m_name(blink::Platform::current()->fileUtilities()->baseName(path))
+    , m_name(Platform::current()->fileUtilities()->baseName(path))
     , m_snapshotSize(-1)
     , m_snapshotModificationTime(invalidFileTime())
 {
     ScriptWrappable::init(this);
 }
 
 File::File(const String& path, const String& name, ContentTypeLookupPolicy policy, UserVisibility userVisibility)
     : Blob(BlobDataHandle::create(createBlobDataForFileWithName(path, name, policy), -1))
     , m_hasBackingFile(true)
     , m_userVisibility(userVisibility)
@@ skipping 184 matching lines @@
     captureSnapshot(size, modificationTime);
     if (!m_fileSystemURL.isEmpty()) {
         blobData.appendFileSystemURL(m_fileSystemURL, 0, size, modificationTime);
         return;
     }
     ASSERT(!m_path.isEmpty());
     blobData.appendFile(m_path, 0, size, modificationTime);
 }
 
 } // namespace blink