docs: sizes enhancements (#8771)

docs/src/api/class-request.md

@@ -201,8 +201,7 @@ Returns the matching [Response] object, or `null` if the response was not receiv
   - `responseBodySize` <[int]> Size of the received response body (encoded) in bytes.
   - `responseHeadersSize` <[int]> Total number of bytes from the start of the HTTP response message until (and including) the double CRLF before the body.
 
-Returns resource size information for given request. Requires the response to be finished via [`method: Response.finished`]
-to ensure the info is available.
+Returns resource size information for given request.
 
 ## method: Request.timing
 - returns: <[Object]>

src/client/network.ts

@@ -145,7 +145,7 @@ export class Request extends ChannelOwner<channels.RequestChannel, channels.Requ
         if (!response)
           return this._headers;
         return response._wrapApiCall(async (channel: channels.ResponseChannel) => {
-          return await (await channel.rawRequestHeaders()).headers;
+          return (await channel.rawRequestHeaders()).headers;
         });
       });
     }

tests/page/page-network-sizes.spec.ts

@@ -26,7 +26,6 @@ it('should set bodySize and headersSize', async ({ page, server }) => {
     page.waitForEvent('request'),
     page.evaluate(() => fetch('./get', { method: 'POST', body: '12345' }).then(r => r.text())),
   ]);
-  await (await request.response()).finished();
   const sizes = await request.sizes();
   expect(sizes.requestBodySize).toBe(5);
   expect(sizes.requestHeadersSize).toBeGreaterThanOrEqual(250);

types/types.d.ts

@@ -13141,8 +13141,7 @@ export interface Request {
   response(): Promise<null|Response>;
 
   /**
-   * Returns resource size information for given request. Requires the response to be finished via
-   * [response.finished()](https://playwright.dev/docs/api/class-response#response-finished) to ensure the info is available.
+   * Returns resource size information for given request.
    */
   sizes(): Promise<{
     /**