feat(core): support cancelling channel calls via AbortSignal

Threads an AbortSignal through the client as a required second argument
on channel methods (mirroring progress on the dispatcher side), so
server-side calls can be cancelled.

Author: Skn0tt

docs/src/api/class-elementhandle.md

@@ -188,6 +188,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.check.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.check.signal = %%-input-signal-%%
+
 ### option: ElementHandle.check.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -233,6 +235,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.click.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.click.signal = %%-input-signal-%%
+
 ### option: ElementHandle.click.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -289,6 +293,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.dblclick.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.dblclick.signal = %%-input-signal-%%
+
 ### option: ElementHandle.dblclick.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -551,6 +557,8 @@ Value to set for the `<input>`, `<textarea>` or `[contenteditable]` element.
 ### option: ElementHandle.fill.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.fill.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.focus
 * since: v1.8
 * discouraged: Use locator-based [`method: Locator.focus`] instead. Read more about [locators](../locators.md).
@@ -599,6 +607,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.hover.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.hover.signal = %%-input-signal-%%
+
 ### option: ElementHandle.hover.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -727,6 +737,8 @@ Time to wait between `keydown` and `keyup` in milliseconds. Defaults to 0.
 ### option: ElementHandle.press.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.press.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.querySelector
 * since: v1.9
 * discouraged: Use locator-based [`method: Page.locator`] instead. Read more about [locators](../locators.md).
@@ -776,6 +788,8 @@ Returns the buffer with the captured screenshot.
 ### option: ElementHandle.screenshot.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.screenshot.signal = %%-input-signal-%%
+
 ### option: ElementHandle.screenshot.maskColor = %%-screenshot-option-mask-color-%%
 * since: v1.34
 
@@ -801,6 +815,8 @@ See [scrolling](../input.md#scrolling) for alternative ways to scroll.
 ### option: ElementHandle.scrollIntoViewIfNeeded.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.scrollIntoViewIfNeeded.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.selectOption
 * since: v1.8
 * discouraged: Use locator-based [`method: Locator.selectOption`] instead. Read more about [locators](../locators.md).
@@ -883,6 +899,8 @@ await handle.SelectOptionAsync(new[] {
 ### option: ElementHandle.selectOption.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.selectOption.signal = %%-input-signal-%%
+
 ### param: ElementHandle.selectOption.element = %%-python-select-options-element-%%
 * since: v1.8
 
@@ -913,6 +931,8 @@ If the element is inside the `<label>` element that has an associated [control](
 ### option: ElementHandle.selectText.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.selectText.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.setChecked
 * discouraged: Use locator-based [`method: Locator.setChecked`] instead. Read more about [locators](../locators.md).
 * since: v1.15
@@ -947,6 +967,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.setChecked.timeout = %%-input-timeout-js-%%
 * since: v1.15
 
+### option: ElementHandle.setChecked.signal = %%-input-signal-%%
+
 ### option: ElementHandle.setChecked.trial = %%-input-trial-%%
 * since: v1.15
 
@@ -973,6 +995,8 @@ This method expects [ElementHandle] to point to an
 ### option: ElementHandle.setInputFiles.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.setInputFiles.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.tap
 * since: v1.8
 * discouraged: Use locator-based [`method: Locator.tap`] instead. Read more about [locators](../locators.md).
@@ -1009,6 +1033,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.tap.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.tap.signal = %%-input-signal-%%
+
 ### option: ElementHandle.tap.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -1050,6 +1076,8 @@ Time to wait between key presses in milliseconds. Defaults to 0.
 ### option: ElementHandle.type.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.type.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.uncheck
 * since: v1.8
 * discouraged: Use locator-based [`method: Locator.uncheck`] instead. Read more about [locators](../locators.md).
@@ -1082,6 +1110,8 @@ When all steps combined have not finished during the specified [`option: timeout
 ### option: ElementHandle.uncheck.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.uncheck.signal = %%-input-signal-%%
+
 ### option: ElementHandle.uncheck.trial = %%-input-trial-%%
 * since: v1.11
 
@@ -1115,6 +1145,8 @@ A state to wait for, see below for more details.
 ### option: ElementHandle.waitForElementState.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.waitForElementState.signal = %%-input-signal-%%
+
 ## async method: ElementHandle.waitForSelector
 * since: v1.8
 * discouraged: Use web assertions that assert visibility or a locator-based [`method: Locator.waitFor`] instead.
@@ -1182,5 +1214,7 @@ This method does not work across navigations, use [`method: Page.waitForSelector
 ### option: ElementHandle.waitForSelector.timeout = %%-input-timeout-js-%%
 * since: v1.8
 
+### option: ElementHandle.waitForSelector.signal = %%-input-signal-%%
+
 ### option: ElementHandle.waitForSelector.strict = %%-input-strict-%%
 * since: v1.15

docs/src/api/class-filechooser.md

@@ -73,3 +73,5 @@ they are resolved relative to the current working directory. For empty array, cl
 
 ### option: FileChooser.setFiles.timeout = %%-input-timeout-js-%%
 * since: v1.8
+
+### option: FileChooser.setFiles.signal = %%-input-signal-%%