Remove internal permissions types and most of SecurityHelper

src/Microsoft.DotNet.Wpf/src/DirectWriteForwarder/CPP/DWriteWrapper/Common.h

@@ -85,14 +85,7 @@ private ref class Util sealed
             System::Exception^ e = System::Runtime::InteropServices::Marshal::GetExceptionForHR(hr);
             if (dynamic_cast<System::Net::WebException^>(e) != nullptr)                
             {
-                if (IsFullTrustCaller())
-                {
-                    throw e;//rethrow original exception for full trust case.
-                }
-                else
-                {
-                    throw gcnew System::Net::WebException();// throw sanitized exception
-                }
+                throw e;
             }
         }
     }

src/Microsoft.DotNet.Wpf/src/Extensions/PresentationFramework-SystemDrawing/SystemDrawingExtension.cs

@@ -191,27 +191,11 @@ internal override object GetBitmapFromBitmapSource(object source)
             formatConverter.DestinationFormat = System.Windows.Media.PixelFormats.Bgr32;
             formatConverter.EndInit();
 
-            CodeAccessPermission mediaAccessPermission = SecurityHelper.CreateMediaAccessPermission(null);
-
-            if (mediaAccessPermission != null)
-            {
-                mediaAccessPermission.Assert(); //BlessedAssert
-            }
-            try
-            {
-                formatConverter.CopyPixels(
-                            new Int32Rect(0, 0, imageWidth, imageHeight),
-                            bmData.Scan0,
-                            bmData.Stride * (bmData.Height - 1) + (bmData.Width * 4),
-                            bmData.Stride);
-            }
-            finally
-            {
-                if (mediaAccessPermission != null)
-                {
-                    CodeAccessPermission.RevertAssert();
-                }
-            }
+            formatConverter.CopyPixels(
+                        new Int32Rect(0, 0, imageWidth, imageHeight),
+                        bmData.Scan0,
+                        bmData.Stride * (bmData.Height - 1) + (bmData.Width * 4),
+                        bmData.Stride);
 
             bitmapFinal.UnlockBits(bmData);
 

src/Microsoft.DotNet.Wpf/src/PresentationCore/MS/internal/AppModel/CookieHandler.cs

@@ -109,9 +109,6 @@ internal static void HandleWebResponse(WebResponse response)
         Justification="It's okay now. Be careful on change.")]
     internal static string GetCookie(Uri uri, bool throwIfNoCookie)
     {
-        // Always demand in order to prevent any cross-domain information leak.
-        SecurityHelper.DemandWebPermission(uri);
-
         UInt32 size = 0;
         string uriString = BindUriHelper.UriToString(uri);
         if (UnsafeNativeMethods.InternetGetCookieEx(uriString, null, null, ref size, 0, IntPtr.Zero))
@@ -134,8 +131,6 @@ internal static string GetCookie(Uri uri, bool throwIfNoCookie)
     [FriendAccessAllowed] // called by PF.Application.SetCookie()
     internal static bool SetCookie(Uri uri, string cookieData)
     {
-        SecurityHelper.DemandWebPermission(uri);
-
         return SetCookieUnsafe(uri, cookieData, null);
     }
 

src/Microsoft.DotNet.Wpf/src/PresentationCore/MS/internal/FontCache/FamilyCollection.cs

@@ -125,15 +125,7 @@ internal static Text.TextInterface.FontCollection LegacyArabicFontCollection
                             if (_legacyArabicFontCollection == null)
                             {
                                 Uri criticalSxSFontsLocation = new Uri(FamilyCollection.SxSFontsResourcePrefix);
-                                SecurityHelper.CreateUriDiscoveryPermission(criticalSxSFontsLocation).Assert();
-                                try
-                                {
-                                    _legacyArabicFontCollection = DWriteFactory.GetFontCollectionFromFolder(criticalSxSFontsLocation);
-                                }
-                                finally
-                                {
-                                    CodeAccessPermission.RevertAssert();
-                                }
+                                _legacyArabicFontCollection = DWriteFactory.GetFontCollectionFromFolder(criticalSxSFontsLocation);
                             }
                         }
                     }
@@ -312,7 +304,6 @@ private FamilyCollection(Uri folderUri, MS.Internal.Text.TextInterface.FontColle
         /// <param name="folderUri">Absolute Uri of a folder</param>
         internal static FamilyCollection FromUri(Uri folderUri)
         {
-            SecurityHelper.DemandUriReadPermission(folderUri);
             return new FamilyCollection(folderUri, DWriteFactory.GetFontCollectionFromFolder(folderUri));
         }