Add WebKitUnitTestSupport::readFromFile and deprecate all PlatformFileHandle related methods

Source/core/platform/FileSystem.h

Index: Source/core/platform/FileSystem.h
diff --git a/Source/core/platform/FileSystem.h b/Source/core/platform/FileSystem.h
index 9af0ecaa68fa7d4155f959c5f6fd9bef1996aa3f..0d96833fa8dcbec52c64bc7913638eebc35d7f7f 100644
--- a/Source/core/platform/FileSystem.h
+++ b/Source/core/platform/FileSystem.h
@@ -38,18 +38,6 @@
 
 namespace WebCore {
 
-#if OS(WINDOWS)
-typedef void *HANDLE;
-typedef HANDLE PlatformFileHandle;
-#else
-typedef int PlatformFileHandle;
-#endif
-
-enum FileOpenMode {
-    OpenForRead = 0,
-    OpenForWrite
-};
-
 struct FileMetadata;
 
 bool getFileSize(const String&, long long& result);
@@ -60,12 +48,6 @@ String directoryName(const String&);
 inline double invalidFileTime() { return std::numeric_limits<double>::quiet_NaN(); }
 inline bool isValidFileTime(double time) { return std::isfinite(time); }
 
-// FIXME: Only used by test code, move them into WebUnitTestSupport.
-PlatformFileHandle openFile(const String& path, FileOpenMode);
-void closeFile(PlatformFileHandle&);
-// Returns number of bytes actually written if successful, -1 otherwise.
-int readFromFile(PlatformFileHandle, char* data, int length);
-
 } // namespace WebCore
 
 #endif // FileSystem_h