[chromecast] Add whitelist entry to enable the URL filter

Provides a whitelist entry for the Activity URL filter as a parameter
to CastWebContents. No whitelist implies no restrictions.

Bug: internal b/148820675
Test: CQ, verified url request blocking in devtools

Merge-With: eureka-internal/360987

Cq-Depend: chromium:2050038
Change-Id: I9e0c329b31e62e9c6c8e039c0f9de395fd119412
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2050039
Commit-Queue: Jiaqi Han <jiaqih@google.com>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743326}

chromecast/browser/cast_web_contents.h

@@ -225,6 +225,10 @@ class CastWebContents {
     // Clients can use it to send queryable values to the render frames.
     // queryable_data_host() will return a nullptr if this is false.
     bool enable_queryable_data_host = false;
+    // Whether to provide a URL filter applied to network requests for the
+    // activity hosted by this CastWebContents.
+    // No filters implies no restrictions.
+    base::Optional<std::vector<std::string>> url_filters = base::nullopt;
 
     InitParams();
     InitParams(const InitParams& other);

chromecast/browser/cast_web_contents_impl.cc

@@ -21,6 +21,7 @@
 #include "chromecast/browser/cast_browser_process.h"
 #include "chromecast/browser/devtools/remote_debugging_server.h"
 #include "chromecast/browser/queryable_data_host_cast.h"
+#include "chromecast/common/mojom/activity_url_filter.mojom.h"
 #include "chromecast/common/mojom/media_playback_options.mojom.h"
 #include "chromecast/common/mojom/on_load_script_injector.mojom.h"
 #include "chromecast/common/mojom/queryable_data_store.mojom.h"
@@ -144,6 +145,7 @@ CastWebContentsImpl::CastWebContentsImpl(content::WebContents* web_contents,
       media_blocker_(init_params.use_media_blocker
                          ? std::make_unique<CastMediaBlocker>(web_contents_)
                          : nullptr),
+      activity_url_filter_(std::move(init_params.url_filters)),
       main_process_host_(nullptr),
       tab_id_(init_params.is_root_window ? 0 : next_tab_id++),
       is_websql_enabled_(init_params.enable_websql),
@@ -491,6 +493,17 @@ void CastWebContentsImpl::RenderFrameCreated(
     // base::Value is not copyable.
     queryable_data_store_remote->Set(value.first, value.second.Clone());
   }
+
+  // Set up URL filter
+  if (activity_url_filter_) {
+    mojo::AssociatedRemote<chromecast::mojom::ActivityUrlFilterConfiguration>
+        activity_filter_setter;
+    render_frame_host->GetRemoteAssociatedInterfaces()->GetInterface(
+        &activity_filter_setter);
+    activity_filter_setter->SetFilter(
+        chromecast::mojom::ActivityUrlFilterCriteria::New(
+            activity_url_filter_.value()));
+  }
 }
 
 void CastWebContentsImpl::RenderFrameHostChanged(

chromecast/browser/cast_web_contents_impl.h

@@ -5,6 +5,7 @@
 #ifndef CHROMECAST_BROWSER_CAST_WEB_CONTENTS_IMPL_H_
 #define CHROMECAST_BROWSER_CAST_WEB_CONTENTS_IMPL_H_
 
+#include <map>
 #include <memory>
 #include <set>
 #include <string>
@@ -169,6 +170,7 @@ class CastWebContentsImpl : public CastWebContents,
   BackgroundColor view_background_color_;
   shell::RemoteDebuggingServer* const remote_debugging_server_;
   std::unique_ptr<CastMediaBlocker> media_blocker_;
+  base::Optional<std::vector<std::string>> activity_url_filter_;
 
   // Retained so that this observer can be removed before being destroyed:
   content::RenderProcessHost* main_process_host_;