[typed_data] Remove UnmodifiableXXXView classes

In most cases, the (now removed) SDK class was patched so that the constructor redirected to a platform-specific implementation of the unmodifiable view. Uses of the SDK class in the platform code could be rewritten to the more direct use of the implementation class.

The big +/- file changes are from moving the implementation classes from the patch file (typed_data_patch.dart), where they are no longer needed, to the internal file (typed_data.dart).

TEST=ci
Bug: #53785
Change-Id: Iaa7370de25b7fc2d26b24f7733c2892868e593cb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370661
Reviewed-by: Ömer Ağacan <[email protected]>
Reviewed-by: Lasse Nielsen <[email protected]>
Reviewed-by: Siva Annamalai <[email protected]>
Commit-Queue: Stephen Adams <[email protected]>
Reviewed-by: Brian Quinlan <[email protected]>

CHANGELOG.md

@@ -36,6 +36,16 @@
 
 [#44876]: https://github.com/dart-lang/sdk/issues/44876
 
+#### `dart:typed_data`
+
+- **BREAKING CHANGE** [#53785][]: The unmodifiable view classes for typed data
+  have been removed. These classes were deprecated in Dart 3.4.
+
+  To create an unmodifiable view of a typed-data object, use the
+  `asUnmodifiableView()` methods added in Dart 3.3.
+
+[#53785]: https://github.com/dart-lang/sdk/issues/53785
+
 ### Tools
 
 #### Linter

runtime/vm/dart_api_impl_test.cc

@@ -2064,7 +2064,7 @@ TEST_CASE(DartAPI_UnmodifiableTypedDataViewListIsTypedData) {
       "import 'dart:typed_data';\n"
       "List testMain(int size) {\n"
       "  var a = new Int8List(size);\n"
-      "  var view = new UnmodifiableInt8ListView(a);\n"
+      "  var view = a.asUnmodifiableView();\n"
       "  return view;\n"
       "}\n";
   // Create a test library and Load up a test script in it.
@@ -2709,7 +2709,7 @@ static void TestUnmodifiableTypedDataViewDirectAccess() {
       "  for (var i = 0; i < 100; i++) {"
       "    list[i] = i;"
       "  }"
-      "  return new UnmodifiableInt8ListView(list);"
+      "  return list.asUnmodifiableView();"
       "}\n";
   // Create a test library and Load up a test script in it.
   Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, nullptr);