Fix fledge web platform tests

Implement IsPrivacySandboxReportingDestinationAttested for headless
shell as suggested in [1].

[1] https://g-issues.chromium.org/issues/338066470#comment11

Bug: 338066470
Change-Id: Ibc740ea4cf344f07a3ea390686ca32e42a4811be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5772963
Commit-Queue: Weizhong Xia <weizhong@google.com>
Reviewed-by: Peter Kvitek <kvitekp@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1340463}

headless/lib/browser/headless_content_browser_client.cc

@@ -319,6 +319,15 @@ bool HeadlessContentBrowserClient::IsInterestGroupAPIAllowed(
   return true;
 }
 
+bool HeadlessContentBrowserClient::IsPrivacySandboxReportingDestinationAttested(
+    content::BrowserContext* browser_context,
+    const url::Origin& destination_origin,
+    content::PrivacySandboxInvokingAPI invoking_api,
+    bool post_impression_reporting) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  return command_line->HasSwitch(switches::kForceReportingDestinationAttested);
+}
+
 bool HeadlessContentBrowserClient::IsSharedStorageAllowed(
     content::BrowserContext* browser_context,
     content::RenderFrameHost* rfh,

headless/lib/browser/headless_content_browser_client.h

@@ -80,6 +80,12 @@ class HeadlessContentBrowserClient : public content::ContentBrowserClient {
                                  const url::Origin& top_frame_origin,
                                  const url::Origin& api_origin) override;
 
+  bool IsPrivacySandboxReportingDestinationAttested(
+      content::BrowserContext* browser_context,
+      const url::Origin& destination_origin,
+      content::PrivacySandboxInvokingAPI invoking_api,
+      bool post_impression_reporting) override;
+
   bool IsSharedStorageAllowed(
       content::BrowserContext* browser_context,
       content::RenderFrameHost* rfh,

headless/public/switches.h

@@ -83,6 +83,10 @@ inline constexpr char kFontRenderHinting[] = "font-render-hinting";
 inline constexpr char kForceNewBrowsingInstance[] =
     "force-new-browsing-instance";
 
+// Force reporting destination attested for headless shell.
+inline constexpr char kForceReportingDestinationAttested[] =
+    "force-reporting-destination-attested";
+
 // Forces Incognito mode even if user data directory is specified using the
 // --user-data-dir switch.
 inline constexpr char kIncognito[] = "incognito";

third_party/blink/tools/blinkpy/wpt_tests/product.py

@@ -141,6 +141,7 @@ def additional_binary_args(self):
             "--canvas-2d-layers",
             '--enable-bfcache',
             '--enable-field-trial-config',
+            '--force-reporting-destination-attested',
             # `headless_shell` doesn't send the `Accept-Language` header by
             # default, so set an arbitrary one that some tests expect.
             '--accept-lang=en-US,en',