Remove w3c dependencies from wasmJs target (#4097)

Author: igoriakovlev

kotlinx-coroutines-core/wasmJs/src/CoroutineContext.kt

@@ -1,7 +1,6 @@
 package kotlinx.coroutines
 
 import kotlinx.coroutines.internal.*
-import org.w3c.dom.*
 import kotlin.coroutines.*
 
 internal external interface JsProcess : JsAny {
@@ -11,7 +10,7 @@ internal external interface JsProcess : JsAny {
 internal fun tryGetProcess(): JsProcess? =
     js("(typeof(process) !== 'undefined' && typeof(process.nextTick) === 'function') ? process : null")
 
-internal fun tryGetWindow(): Window? =
+internal fun tryGetWindow(): W3CWindow? =
     js("(typeof(window) !== 'undefined' && window != null && typeof(window.addEventListener) === 'function') ? window : null")
 
 internal actual fun createDefaultDispatcher(): CoroutineDispatcher =

kotlinx-coroutines-core/wasmJs/src/JSDispatcher.kt

@@ -1,9 +1,10 @@
 package kotlinx.coroutines
 
-import org.w3c.dom.Window
 import kotlin.js.*
 
-public actual typealias W3CWindow = Window
+public actual abstract external class W3CWindow {
+    public fun clearTimeout(handle: Int)
+}
 
 internal actual fun w3cSetTimeout(window: W3CWindow, handler: () -> Unit, timeout: Int): Int =
     setTimeout(window, handler, timeout)
@@ -40,7 +41,7 @@ internal class NodeDispatcher(private val process: JsProcess) : SetTimeoutBasedD
 }
 
 @Suppress("UNUSED_PARAMETER")
-private fun subscribeToWindowMessages(window: Window, process: () -> Unit): Unit = js("""{
+private fun subscribeToWindowMessages(window: W3CWindow, process: () -> Unit): Unit = js("""{
     const handler = (event) => {
         if (event.source == window && event.data == 'dispatchCoroutine') {
             event.stopPropagation();
@@ -51,7 +52,7 @@ private fun subscribeToWindowMessages(window: Window, process: () -> Unit): Unit
 }""")
 
 @Suppress("UNUSED_PARAMETER")
-private fun createRescheduleMessagePoster(window: Window): () -> Unit =
+private fun createRescheduleMessagePoster(window: W3CWindow): () -> Unit =
     js("() => window.postMessage('dispatchCoroutine', '*')")
 
 @Suppress("UNUSED_PARAMETER")
@@ -84,5 +85,5 @@ private fun clearTimeout(handle: Int): Unit =
     js("{ if (typeof clearTimeout !== 'undefined') clearTimeout(handle); }")
 
 @Suppress("UNUSED_PARAMETER")
-private fun setTimeout(window: Window, handler: () -> Unit, timeout: Int): Int =
+private fun setTimeout(window: W3CWindow, handler: () -> Unit, timeout: Int): Int =
     js("window.setTimeout(handler, timeout)")