Move fileapi into its own component

webkit/fileapi/file_system_quota_client.h

Index: webkit/fileapi/file_system_quota_client.h
diff --git a/webkit/fileapi/file_system_quota_client.h b/webkit/fileapi/file_system_quota_client.h
index 626f9fe9c5cefa590ad3881ab0592da431af7402..adca8a6f4fc1034b3e635f5a0607bafb752684ef 100644
--- a/webkit/fileapi/file_system_quota_client.h
+++ b/webkit/fileapi/file_system_quota_client.h
@@ -13,6 +13,7 @@
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
+#include "webkit/fileapi/fileapi_export.h"
 #include "webkit/fileapi/file_system_quota_util.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/quota/quota_client.h"
@@ -31,8 +32,9 @@ class FileSystemContext;
 // is called.
 // All of the public methods of this class are called by the quota manager
 // (except for the constructor/destructor).
-class FileSystemQuotaClient : public quota::QuotaClient,
-                              public quota::QuotaTaskObserver {
+class FILEAPI_EXPORT_PRIVATE FileSystemQuotaClient
+    : public NON_EXPORTED_BASE(quota::QuotaClient),
+      public quota::QuotaTaskObserver {
  public:
   FileSystemQuotaClient(
       FileSystemContext* file_system_context,