[^ann] IDEA-86873 Out of memory exception when trying to manage file encodings

(cherry-picked from d9908e4)

platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VirtualFileSystemEntry.java

@@ -29,6 +29,7 @@ import com.intellij.openapi.vfs.encoding.EncodingManager;
 import com.intellij.openapi.vfs.encoding.EncodingRegistry;
 import com.intellij.openapi.vfs.newvfs.NewVirtualFile;
 import com.intellij.openapi.vfs.newvfs.persistent.PersistentFS;
+import com.intellij.psi.SingleRootFileViewProvider;
 import com.intellij.util.io.IOUtil;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
@@ -440,6 +441,9 @@ public abstract class VirtualFileSystemEntry extends NewVirtualFile {
         charset = configured == null ? Charset.defaultCharset() : configured;
         setCharset(charset);
       }
+      else if (SingleRootFileViewProvider.isTooLargeForContentLoading(this)) {
+        charset = super.getCharset();
+      }
       else {
         try {
           final byte[] content;

platform/util-rt/src/com/intellij/openapi/util/io/FileUtilRt.java

@@ -367,10 +367,6 @@ public class FileUtilRt {
 
   @NotNull
   public static byte[] loadBytes(@NotNull InputStream stream, int length) throws IOException {
-    if (isTooLarge(length)) {
-      throw new FileTooBigException("Too large file, size is " + length + " bytes.");
-    }
-
     byte[] bytes = new byte[length];
     int count = 0;
     while (count < length) {