Eliminate Android-specific Vulkan support

This eliminates Vulkan support for Android. As of flutter#27980
(c2f2291) we are no longer running Android-Vulkan builds. This
eliminates the --enable-vulkan flag from tools/gn and any code that is
only reachable when that flag is enabled.

Note that after this patch, `shell_enable_vulkan` is always false,
however the //flutter/shell/gpu:gpu_surface_vulkan target and source
files remain since they are still used when `test_enable_vulkan` is
true, which is the case when `is_fuchsia` is true. Note that these files
are *not* built as part of a regular fuchsia build (see the
`shell_gpu_configuration` in //shell/platform/fuchsia/flutter/BUILD.gn),
but may be enabled once the Fuchsia embedder is migrated to the Embedder
API.

ci/licenses_golden/licenses_flutter

@@ -778,8 +778,6 @@ FILE: ../../../flutter/shell/platform/android/android_surface_gl.cc
 FILE: ../../../flutter/shell/platform/android/android_surface_gl.h
 FILE: ../../../flutter/shell/platform/android/android_surface_software.cc
 FILE: ../../../flutter/shell/platform/android/android_surface_software.h
-FILE: ../../../flutter/shell/platform/android/android_surface_vulkan.cc
-FILE: ../../../flutter/shell/platform/android/android_surface_vulkan.h
 FILE: ../../../flutter/shell/platform/android/apk_asset_provider.cc
 FILE: ../../../flutter/shell/platform/android/apk_asset_provider.h
 FILE: ../../../flutter/shell/platform/android/context/android_context.cc

shell/platform/android/BUILD.gn

@@ -12,8 +12,8 @@ import("//flutter/shell/version/version.gni")
 
 shell_gpu_configuration("android_gpu_configuration") {
   enable_software = true
-  enable_vulkan = shell_enable_vulkan
   enable_gl = true
+  enable_vulkan = false
   enable_metal = false
 }
 
@@ -95,17 +95,6 @@ shared_library("flutter_shell_native") {
 
   defines = []
 
-  if (shell_enable_vulkan) {
-    sources += [
-      "android_surface_vulkan.cc",
-      "android_surface_vulkan.h",
-    ]
-
-    deps += [ "//flutter/vulkan" ]
-
-    defines += [ "SHELL_ENABLE_VULKAN" ]
-  }
-
   libs = [
     "android",
     "EGL",

shell/platform/android/context/android_context.h

@@ -13,7 +13,6 @@ namespace flutter {
 enum class AndroidRenderingAPI {
   kSoftware,
   kOpenGLES,
-  kVulkan,
 };
 
 //------------------------------------------------------------------------------

shell/platform/android/platform_view_android.cc

@@ -18,10 +18,6 @@
 #include "flutter/shell/platform/android/surface/android_surface.h"
 #include "flutter/shell/platform/android/surface/snapshot_surface_producer.h"
 
-#if SHELL_ENABLE_VULKAN
-#include "flutter/shell/platform/android/android_surface_vulkan.h"
-#endif  // SHELL_ENABLE_VULKAN
-
 #include "flutter/shell/platform/android/context/android_context.h"
 #include "flutter/shell/platform/android/jni/platform_view_android_jni.h"
 #include "flutter/shell/platform/android/platform_message_response_android.h"
@@ -43,11 +39,6 @@ std::unique_ptr<AndroidSurface> AndroidSurfaceFactoryImpl::CreateSurface() {
                                                       jni_facade_);
     case AndroidRenderingAPI::kOpenGLES:
       return std::make_unique<AndroidSurfaceGL>(android_context_, jni_facade_);
-    case AndroidRenderingAPI::kVulkan:
-#if SHELL_ENABLE_VULKAN
-      return std::make_unique<AndroidSurfaceVulkan>(android_context_,
-                                                    jni_facade_);
-#endif  // SHELL_ENABLE_VULKAN
     default:
       FML_DCHECK(false);
       return nullptr;
@@ -63,13 +54,9 @@ static std::shared_ptr<flutter::AndroidContext> CreateAndroidContext(
   if (use_software_rendering) {
     return std::make_shared<AndroidContext>(AndroidRenderingAPI::kSoftware);
   }
-#if SHELL_ENABLE_VULKAN
-  return std::make_shared<AndroidContext>(AndroidRenderingAPI::kVulkan);
-#else   // SHELL_ENABLE_VULKAN
   return std::make_unique<AndroidContextGL>(
       AndroidRenderingAPI::kOpenGLES,
       fml::MakeRefCounted<AndroidEnvironmentGL>());
-#endif  // SHELL_ENABLE_VULKAN
 }
 
 PlatformViewAndroid::PlatformViewAndroid(

shell/platform/fuchsia/flutter/BUILD.gn

@@ -17,6 +17,8 @@ import("//flutter/vulkan/config.gni")
 shell_gpu_configuration("fuchsia_gpu_configuration") {
   enable_software = false
   enable_gl = false
+
+  # TODO(gw280): Enable once Fuchsia supports Vulkan through the embedder.
   enable_vulkan = false
   enable_metal = false
 }

tools/gn

@@ -54,9 +54,6 @@ def get_out_dir(args):
     if args.target_os == 'fuchsia' and args.fuchsia_cpu is not None:
       target_dir.append(args.fuchsia_cpu)
 
-    if args.enable_vulkan:
-        target_dir.append('vulkan')
-
     # This exists for backwards compatibility of tests that are being run
     # on LUCI. This can be removed in coordination with a LUCI change:
     # https://github.com/flutter/flutter/issues/76547
@@ -115,9 +112,6 @@ def to_gn_args(args):
         if args.target_os == 'android':
             raise Exception('--simulator is not supported on Android')
 
-    if args.target_os != 'android' and args.enable_vulkan:
-      raise Exception('--enable-vulkan is only supported on Android')
-
     runtime_mode = args.runtime_mode
 
     gn_args = {}
@@ -301,12 +295,6 @@ def to_gn_args(args):
       gn_args['skia_use_metal'] = True
       gn_args['shell_enable_metal'] = True
 
-    if args.enable_vulkan:
-      # Enable vulkan in the Flutter shell.
-      gn_args['shell_enable_vulkan'] = True
-      # Configure Skia for Vulkan support.
-      gn_args['skia_use_vulkan'] = True
-
     if sys.platform.startswith(('cygwin', 'win')):
       # The buildroot currently isn't set up to support Vulkan in the
       # Windows ANGLE build, so disable it regardless of enable_vulkan's value.