Bump minimum supported chrome version from 32 to 33 (emscripten-core#23077)

This allows us to remove the promise polyfill: https://caniuse.com/promises

Author: sbc100

ChangeLog.md

@@ -22,6 +22,7 @@ See docs/process.md for more on how version tagging works.
 -----------------------
 - The file system was updated to independently track atime, mtime and ctime
   instead of using the same time for all three. (#22998)
+- The minimum supported chrome version was bumped from 32 to 33. (#23077)
 
 3.1.73 - 11/28/24
 -----------------

site/source/docs/tools_reference/settings_reference.rst

@@ -2939,7 +2939,7 @@ This setting also applies to modern Chromium-based Edge, which shares version
 numbers with Chrome.
 Chrome 85 was released on 2020-08-25.
 MAX_INT (0x7FFFFFFF, or -1) specifies that target is not supported.
-Minimum supported value is 32, which was released on 2014-01-04.
+Minimum supported value is 33, which was released on 2014-02-18.
 
 Default value: 85
 

src/polyfill/promise.js

@@ -1919,7 +1919,7 @@ var MIN_SAFARI_VERSION = 140100;
 // numbers with Chrome.
 // Chrome 85 was released on 2020-08-25.
 // MAX_INT (0x7FFFFFFF, or -1) specifies that target is not supported.
-// Minimum supported value is 32, which was released on 2014-01-04.
+// Minimum supported value is 33, which was released on 2014-02-18.
 // [link]
 var MIN_CHROME_VERSION = 85;
 

src/settings.js

@@ -34,14 +34,6 @@ var Module = typeof {{{ EXPORT_NAME }}} != 'undefined' ? {{{ EXPORT_NAME }}} : {
 #endif // USE_CLOSURE_COMPILER
 
 #if POLYFILL
-#if ((MAYBE_WASM2JS && WASM != 2) || MODULARIZE) && (MIN_CHROME_VERSION < 33 || MIN_FIREFOX_VERSION < 29 || MIN_SAFARI_VERSION < 80000)
-// Include a Promise polyfill for legacy browsers. This is needed either for
-// wasm2js, where we polyfill the wasm API which needs Promises, or when using
-// modularize which creates a Promise for when the module is ready.
-// See https://caniuse.com/#feat=promises
-#include "polyfill/promise.js"
-#endif
-
 #if MIN_CHROME_VERSION < 45 || MIN_FIREFOX_VERSION < 34 || MIN_SAFARI_VERSION < 90000
 // See https://caniuse.com/mdn-javascript_builtins_object_assign
 #include "polyfill/objassign.js"

src/shell.js

@@ -12427,29 +12427,6 @@ def test_standalone_syscalls(self):
     for engine in config.WASM_ENGINES:
       self.assertContained(expected, self.run_js('test.wasm', engine))
 
-  @parameterized({
-    'wasm2js': (['-sWASM=0'],),
-    'modularize': (['-sMODULARIZE', '--extern-post-js', test_file('modularize_post_js.js')],),
-  })
-  def test_promise_polyfill(self, constant_args):
-    def test(args, expect_fail):
-      # legacy browsers may lack Promise, which wasm2js depends on. see what
-      # happens when we kill the global Promise function.
-      self.run_process([EMCC, test_file('hello_world.c')] + constant_args + args)
-      js = read_file('a.out.js')
-      create_file('a.out.js', 'Promise = undefined;\n' + js)
-      return self.run_js('a.out.js', assert_returncode=NON_ZERO if expect_fail else 0)
-
-    # we fail without legacy support
-    test([], expect_fail=True)
-
-    # but work with it
-    output = test(['-sLEGACY_VM_SUPPORT'], expect_fail=False)
-    self.assertContained('hello, world!', output)
-
-    # unless we explicitly disable polyfills
-    test(['-sLEGACY_VM_SUPPORT', '-sNO_POLYFILL'], expect_fail=True)
-
   @parameterized({
     '': ([],),
     'assertions': (['-sASSERTIONS'],),
@@ -15265,7 +15242,7 @@ def test_no_extra_output(self):
 
   def test_browser_too_old(self):
     err = self.expect_fail([EMCC, test_file('hello_world.c'), '-sMIN_CHROME_VERSION=10'])
-    self.assertContained('emcc: error: MIN_CHROME_VERSION older than 32 is not supported', err)
+    self.assertContained('emcc: error: MIN_CHROME_VERSION older than 33 is not supported', err)
 
   def test_js_only_settings(self):
     err = self.run_process([EMCC, test_file('hello_world.c'), '-o', 'foo.wasm', '-sDEFAULT_LIBRARY_FUNCS_TO_INCLUDE=emscripten_get_heap_max'], stderr=PIPE).stderr

test/test_other.py

@@ -18,7 +18,7 @@
 # Oldest support browser versions.  These have been set somewhat
 # arbitrarily for now.
 # TODO(sbc): Design a of policy for managing these values.
-OLDEST_SUPPORTED_CHROME = 32
+OLDEST_SUPPORTED_CHROME = 33
 OLDEST_SUPPORTED_FIREFOX = 34
 OLDEST_SUPPORTED_SAFARI = 90000
 # 10.19.0 is the oldest version of node that we do any testing with.