Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebFileSystemCallbacks.cpp

Index: Source/platform/exported/WebFileSystemCallbacks.cpp
diff --git a/Source/platform/exported/WebFileSystemCallbacks.cpp b/Source/platform/exported/WebFileSystemCallbacks.cpp
index dc24ed797bbcf90e7efd93efc66cec147ee06219..c57ef23aa96c8422056d0c2898822411a248d566 100644
--- a/Source/platform/exported/WebFileSystemCallbacks.cpp
+++ b/Source/platform/exported/WebFileSystemCallbacks.cpp
@@ -42,8 +42,6 @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
-using namespace blink;
-
 namespace blink {
 
 class WebFileSystemCallbacksPrivate : public RefCounted<WebFileSystemCallbacksPrivate> {
@@ -131,7 +129,7 @@ void WebFileSystemCallbacks::didOpenFileSystem(const WebString& name, const WebU
 void WebFileSystemCallbacks::didResolveURL(const WebString& name, const WebURL& rootURL, WebFileSystemType type, const WebString& filePath, bool isDirectory)
 {
     ASSERT(!m_private.isNull());
-    m_private->callbacks()->didResolveURL(name, rootURL, static_cast<blink::FileSystemType>(type), filePath, isDirectory);
+    m_private->callbacks()->didResolveURL(name, rootURL, static_cast<FileSystemType>(type), filePath, isDirectory);
     m_private.reset();
 }