Reverts "Move emscripten out of the buildroot into the flutter repo. (#51299)"

DEPS

@@ -283,7 +283,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + 'b1fdfb2c98dfb6270c3ce83e67832e56d10865e6',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + 'e9df434539745202fa5f9b729fe5f82e5de3f025',
 
   'src/flutter/third_party/depot_tools':
   Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '580b4ff3f5cd0dcaa2eacda28cefe0f45320e8f7',
@@ -789,6 +789,16 @@ deps = {
      'dep_type': 'cipd',
    },
 
+  'src/third_party/web_dependencies': {
+     'packages': [
+       {
+         'package': 'flutter/web/canvaskit_bundle',
+         'version': Var('canvaskit_cipd_instance')
+       }
+     ],
+     'dep_type': 'cipd',
+   },
+
   'src/third_party/java/openjdk': {
      'packages': [
        {
@@ -819,7 +829,7 @@ deps = {
     'dep_type': 'cipd',
   },
 
-  'src/flutter/prebuilts/emsdk': {
+  'src/buildtools/emsdk': {
    'url': Var('skia_git') + '/external/github.com/emscripten-core/emsdk.git' + '@' + 'a896e3d066448b3530dbcaa48869fafefd738f57',
    'condition': 'download_emsdk',
   },
@@ -1045,7 +1055,7 @@ deps = {
     'dep_type': 'cipd',
   },
 
-  'src/flutter/third_party/google_fonts_for_unit_tests': {
+  'src/third_party/google_fonts_for_unit_tests': {
       'packages': [
         {
           'package': 'flutter/flutter_font_fallbacks',

ci/licenses_golden/excluded_files

@@ -1541,7 +1541,6 @@
 ../../../flutter/third_party/glfw/src/CMakeLists.txt
 ../../../flutter/third_party/glfw/tests
 ../../../flutter/third_party/gn
-../../../flutter/third_party/google_fonts_for_unit_tests
 ../../../flutter/third_party/googletest
 ../../../flutter/third_party/gtest-parallel/.git
 ../../../flutter/third_party/gtest-parallel/.gitignore
@@ -3131,6 +3130,7 @@
 ../../../third_party/dart/utils/OWNERS
 ../../../third_party/dart/utils/compiler/.gitignore
 ../../../third_party/dart/utils/dartanalyzer/.gitignore
+../../../third_party/google_fonts_for_unit_tests
 ../../../third_party/gradle
 ../../../third_party/java
 ../../../third_party/libcxx/.clang-format
@@ -3310,6 +3310,7 @@
 ../../../third_party/perfetto/ui/src/plugins/dev.perfetto.AndroidPerf/OWNERS
 ../../../third_party/perfetto/ui/src/plugins/dev.perfetto.LargeScreensPerf/OWNERS
 ../../../third_party/perfetto/ui/src/test
+../../../third_party/web_dependencies/canvaskit
 ../../../third_party/zlib/.git
 ../../../third_party/zlib/CMakeLists.txt
 ../../../third_party/zlib/DIR_METADATA

ci/licenses_golden/tool_signature

@@ -1,2 +1,2 @@
-Signature: 46b0db75dff939f8b39145a50f827d47
+Signature: 6d4a7215ee5679ace5ae272f414246bb
 

lib/web_ui/dev/roll_fallback_fonts.dart

@@ -323,7 +323,7 @@ OTHER DEALINGS IN THE FONT SOFTWARE.
     );
     await runProcess('gclient', <String>[
       'setdep',
-      '--revision=src/flutter/third_party/google_fonts_for_unit_tests:$packageName@$versionString',
+      '--revision=src/third_party/google_fonts_for_unit_tests:$packageName@$versionString',
       '--deps-file=$depFilePath'
     ]);
   }

lib/web_ui/dev/steps/copy_artifacts_step.dart

@@ -105,7 +105,6 @@ class CopyArtifactsStep implements PipelineStep {
 
     final io.Directory fallbackFontsSource = io.Directory(pathlib.join(
       environment.engineSrcDir.path,
-      'flutter',
       'third_party',
       'google_fonts_for_unit_tests',
     ));

tools/activate_emsdk.py

@@ -9,7 +9,7 @@
 import subprocess
 import sys
 
-EMSDK_ROOT = os.path.abspath(os.path.join(__file__, '..', '..', 'prebuilts', 'emsdk'))
+EMSDK_ROOT = os.path.abspath(os.path.join(__file__, '..', '..', '..', 'buildtools', 'emsdk'))
 
 EMSDK_PATH = os.path.join(EMSDK_ROOT, 'emsdk.py')
 

tools/licenses/lib/paths.dart

@@ -63,7 +63,6 @@ final Set<String> skippedPaths = <String>{
   r'flutter/third_party/glfw/deps', // Only used by examples and tests; not linked in build.
   r'flutter/third_party/glfw/docs',
   r'flutter/third_party/gn',
-  r'flutter/third_party/google_fonts_for_unit_tests', // only used in web unit tests
   r'flutter/third_party/harfbuzz/docs',
   r'flutter/third_party/harfbuzz/util', // utils are command line tools that do not end up in the binary
   r'flutter/third_party/icu/filters',
@@ -199,6 +198,7 @@ final Set<String> skippedPaths = <String>{
   r'third_party/dart/third_party/pkg_tested',
   r'third_party/dart/third_party/requirejs', // only used by DDC
   r'third_party/dart/tools', // not shipped in binary
+  r'third_party/google_fonts_for_unit_tests', // only used in web unit tests
   r'third_party/gradle',
   r'third_party/java', // only used for Android builds
   r'third_party/libcxx/benchmarks',
@@ -217,6 +217,7 @@ final Set<String> skippedPaths = <String>{
   r'third_party/perfetto/src/trace_processor', // contains nothing that ends up in the binary executable
   r'third_party/perfetto/src/traced', // contains nothing that ends up in the binary executable
   r'third_party/perfetto/src/tracing', // contains nothing that ends up in the binary executable
+  r'third_party/web_dependencies/canvaskit', // redundant; covered by Skia dependencies
   r'third_party/zlib/contrib/minizip/miniunz.c', // sample file
   r'third_party/zlib/contrib/minizip/minizip.c', // sample file
   r'tools', // not distributed in binary