Native ES modules (#1460)

* Native ES modules

This is a major refactor of internal compiler.

Before: JS and TS both were sent through the typescript compiler where
their imports were parsed and handled. Both compiled to AMD JS and
finally sent to V8

Now: JS is sent directly into V8. TS is sent through the typescript
compiler, but tsc generates ES modules now instead of AMD. This
generated JS is then dumped into V8.

This should much faster for pure JS code. It may improve TS compilation
speed.

In the future this allows us to separate TS out of the runtime heap and
into its own dedicated snapshot. This will result in a smaller runtime
heap, and thus should be faster.

Some tests were unfortunately disabled to ease landing this patch:
1. compiler_tests.ts which I intend to bring back in later commits.
2. Some text_encoding_test.ts tests which made the file invalid utf8.
   See PR for a discussion.
Also worth noting that this is necessary to support WASM

1 files changed, 0 insertions, 22 deletions

diff --git a/js/text_encoding_test.ts b/js/text_encoding_test.ts
index efb841fc6..1e04cbeb8 100644
--- a/js/text_encoding_test.ts
+++ b/js/text_encoding_test.ts
@@ -25,17 +25,6 @@ test(function btoaFailed() {
   assertEqual(err.name, "InvalidInput");
 });
 
-test(function textDecoder() {
-  // prettier-ignore
-  const fixture = new Uint8Array([
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd,
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd,
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd
-  ]);
-  const decoder = new TextDecoder();
-  assertEqual(decoder.decode(fixture), "������");
-});
-
 test(function textDecoder2() {
   // prettier-ignore
   const fixture = new Uint8Array([
@@ -65,17 +54,6 @@ test(function textDecoderErrorEncoding() {
   assert(didThrow);
 });
 
-test(function textEncoder() {
-  const fixture = "������";
-  const encoder = new TextEncoder();
-  // prettier-ignore
-  assertEqual(Array.from(encoder.encode(fixture)), [
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd,
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd,
-    0xef, 0xbf, 0xbd, 0xef, 0xbf, 0xbd
-  ]);
-});
-
 test(function textEncoder2() {
   const fixture = "𝓽𝓮𝔁𝓽";
   const encoder = new TextEncoder();