Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h

Index: third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h
diff --git a/third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h b/third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h
index 937f0573072b448ed9587ff47bd1b0d4c726c1a5..0deb73a8de4d5f84fda4545251d2eaaae188dc1f 100644
--- a/third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h
+++ b/third_party/WebKit/Source/modules/filesystem/FileSystemCallbacks.h
@@ -36,7 +36,6 @@
 #include "platform/FileSystemType.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
-#include <memory>
 
 namespace blink {
 
@@ -84,7 +83,7 @@ protected:
 
 class EntryCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*, const String& expectedPath, bool isDirectory);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*, const String& expectedPath, bool isDirectory);
     void didSucceed() override;
 
 private:
@@ -96,7 +95,7 @@ private:
 
 class EntriesCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(EntriesCallback*, ErrorCallback*, ExecutionContext*, DirectoryReaderBase*, const String& basePath);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(EntriesCallback*, ErrorCallback*, ExecutionContext*, DirectoryReaderBase*, const String& basePath);
     void didReadDirectoryEntry(const String& name, bool isDirectory) override;
     void didReadDirectoryEntries(bool hasMore) override;
 
@@ -110,7 +109,7 @@ private:
 
 class FileSystemCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(FileSystemCallback*, ErrorCallback*, ExecutionContext*, FileSystemType);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(FileSystemCallback*, ErrorCallback*, ExecutionContext*, FileSystemType);
     void didOpenFileSystem(const String& name, const KURL& rootURL) override;
 
 private:
@@ -121,7 +120,7 @@ private:
 
 class ResolveURICallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(EntryCallback*, ErrorCallback*, ExecutionContext*);
     void didResolveURL(const String& name, const KURL& rootURL, FileSystemType, const String& filePath, bool isDirectry) override;
 
 private:
@@ -131,7 +130,7 @@ private:
 
 class MetadataCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(MetadataCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(MetadataCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
     void didReadMetadata(const FileMetadata&) override;
 
 private:
@@ -141,8 +140,8 @@ private:
 
 class FileWriterBaseCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(FileWriterBase*, FileWriterBaseCallback*, ErrorCallback*, ExecutionContext*);
-    void didCreateFileWriter(std::unique_ptr<WebFileWriter>, long long length) override;
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(FileWriterBase*, FileWriterBaseCallback*, ErrorCallback*, ExecutionContext*);
+    void didCreateFileWriter(PassOwnPtr<WebFileWriter>, long long length) override;
 
 private:
     FileWriterBaseCallbacks(FileWriterBase*, FileWriterBaseCallback*, ErrorCallback*, ExecutionContext*);
@@ -152,7 +151,7 @@ private:
 
 class SnapshotFileCallback final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(DOMFileSystemBase*, const String& name, const KURL&, BlobCallback*, ErrorCallback*, ExecutionContext*);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(DOMFileSystemBase*, const String& name, const KURL&, BlobCallback*, ErrorCallback*, ExecutionContext*);
     virtual void didCreateSnapshotFile(const FileMetadata&, PassRefPtr<BlobDataHandle> snapshot);
 
 private:
@@ -164,7 +163,7 @@ private:
 
 class VoidCallbacks final : public FileSystemCallbacksBase {
 public:
-    static std::unique_ptr<AsyncFileSystemCallbacks> create(VoidCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
+    static PassOwnPtr<AsyncFileSystemCallbacks> create(VoidCallback*, ErrorCallback*, ExecutionContext*, DOMFileSystemBase*);
     void didSucceed() override;
 
 private: