[webcrypto] Replace KeyAlgorithm interfaces with an Object.

Source/modules/modules.gypi

Index: Source/modules/modules.gypi
diff --git a/Source/modules/modules.gypi b/Source/modules/modules.gypi
index c03c7b011aaa93e684d35d4e893ccff439339798..64856f8419a3a691b0604aa64b1d561ceac770fc 100644
--- a/Source/modules/modules.gypi
+++ b/Source/modules/modules.gypi
@@ -15,13 +15,8 @@
     'modules_idl_files': [
       '<@(extra_blink_module_idl_files)',
       'battery/BatteryManager.idl',
-      'crypto/AesKeyAlgorithm.idl',
       'crypto/Crypto.idl',
       'crypto/CryptoKey.idl',
-      'crypto/HmacKeyAlgorithm.idl',
-      'crypto/KeyAlgorithm.idl',
-      'crypto/RsaHashedKeyAlgorithm.idl',
-      'crypto/RsaKeyAlgorithm.idl',
       'crypto/SubtleCrypto.idl',
       'device_light/DeviceLightEvent.idl',
       'device_orientation/DeviceAcceleration.idl',
@@ -296,8 +291,6 @@
       'battery/NavigatorBattery.h',
       'beacon/NavigatorBeacon.cpp',
       'beacon/NavigatorBeacon.h',
-      'crypto/AesKeyAlgorithm.cpp',
-      'crypto/AesKeyAlgorithm.h',
       'crypto/Crypto.cpp',
       'crypto/Crypto.h',
       'crypto/CryptoKey.cpp',
@@ -306,16 +299,8 @@
       'crypto/CryptoResultImpl.h',
       'crypto/DOMWindowCrypto.cpp',
       'crypto/DOMWindowCrypto.h',
-      'crypto/HmacKeyAlgorithm.cpp',
-      'crypto/HmacKeyAlgorithm.h',
-      'crypto/KeyAlgorithm.cpp',
-      'crypto/KeyAlgorithm.h',
       'crypto/NormalizeAlgorithm.cpp',
       'crypto/NormalizeAlgorithm.h',
-      'crypto/RsaHashedKeyAlgorithm.cpp',
-      'crypto/RsaHashedKeyAlgorithm.h',
-      'crypto/RsaKeyAlgorithm.cpp',
-      'crypto/RsaKeyAlgorithm.h',
       'crypto/SubtleCrypto.cpp',
       'crypto/SubtleCrypto.h',
       'crypto/WorkerGlobalScopeCrypto.cpp',