CREDENTIAL: Add 'PasswordCredential::toFormData()'

Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 411 matching lines @@
       'background_sync/SyncRegistrationOptions.idl',
       'bluetooth/BluetoothScanFilter.idl',
       'bluetooth/RequestDeviceOptions.idl',
       'cachestorage/CacheQueryOptions.idl',
       'canvas2d/Canvas2DContextAttributes.idl',
       'canvas2d/HitRegionOptions.idl',
       'credentialmanager/CredentialData.idl',
       'credentialmanager/CredentialRequestOptions.idl',
       'credentialmanager/FederatedCredentialData.idl',
       'credentialmanager/FederatedCredentialRequestOptions.idl',
+      'credentialmanager/FormDataOptions.idl',
       'credentialmanager/LocallyStoredCredentialData.idl',
       'credentialmanager/PasswordCredentialData.idl',
       'device_light/DeviceLightEventInit.idl',
       'encoding/TextDecodeOptions.idl',
       'encoding/TextDecoderOptions.idl',
       'encryptedmedia/MediaEncryptedEventInit.idl',
       'encryptedmedia/MediaKeyMessageEventInit.idl',
       'encryptedmedia/MediaKeySystemConfiguration.idl',
       'encryptedmedia/MediaKeySystemMediaCapability.idl',
       'filesystem/FileSystemFlags.idl',
@@ skipping 73 matching lines @@
       '<(blink_modules_output_dir)/canvas2d/HitRegionOptions.cpp',
       '<(blink_modules_output_dir)/canvas2d/HitRegionOptions.h',
       '<(blink_modules_output_dir)/credentialmanager/CredentialData.cpp',
       '<(blink_modules_output_dir)/credentialmanager/CredentialData.h',
       '<(blink_modules_output_dir)/credentialmanager/CredentialRequestOptions.cpp',
       '<(blink_modules_output_dir)/credentialmanager/CredentialRequestOptions.h',
       '<(blink_modules_output_dir)/credentialmanager/FederatedCredentialData.cpp',
       '<(blink_modules_output_dir)/credentialmanager/FederatedCredentialData.h',
       '<(blink_modules_output_dir)/credentialmanager/FederatedCredentialRequestOptions.cpp',
       '<(blink_modules_output_dir)/credentialmanager/FederatedCredentialRequestOptions.h',
+      '<(blink_modules_output_dir)/credentialmanager/FormDataOptions.cpp',
+      '<(blink_modules_output_dir)/credentialmanager/FormDataOptions.h',
       '<(blink_modules_output_dir)/credentialmanager/LocallyStoredCredentialData.cpp',
       '<(blink_modules_output_dir)/credentialmanager/LocallyStoredCredentialData.h',
       '<(blink_modules_output_dir)/credentialmanager/PasswordCredentialData.cpp',
       '<(blink_modules_output_dir)/credentialmanager/PasswordCredentialData.h',
       '<(blink_modules_output_dir)/device_light/DeviceLightEventInit.cpp',
       '<(blink_modules_output_dir)/device_light/DeviceLightEventInit.h',
       '<(blink_modules_output_dir)/encoding/TextDecodeOptions.cpp',
       '<(blink_modules_output_dir)/encoding/TextDecodeOptions.h',
       '<(blink_modules_output_dir)/encoding/TextDecoderOptions.cpp',
       '<(blink_modules_output_dir)/encoding/TextDecoderOptions.h',
@@ skipping 1268 matching lines @@
       'webaudio/AudioBasicProcessorHandlerTest.cpp',
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }