[Android WebView] Add InterceptedRequest class and OnReceivedHttpError callback.

Add InterceptedRequest class, which represents an in-progress network request
and allows to receive callbacks at certain points in the process and control
the flow.

This patch also adds code for the OnReceivedHttpError callback, which fixes
the following tests:
- org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testAfterRedirect
- org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testForMainResource
- org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testForSubresource
- org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testNotCalledIfNoHttpError

This patch in more detail:
- add IntercepedRequest internal class
- add code necessary for AwContentsClientBridge lookup
- detect http errors and code for the onReceivedHttpError callback
- update tests filter

BUG=891722

Cq-Include-Trybots: luci.chromium.try:linux_mojo
Change-Id: I2123a30b0c9ea8c3f07c34adc0fedb6bc69ca8f3
Reviewed-on: https://chromium-review.googlesource.com/c/1259019
Commit-Queue: Tim Volodine <timvolodine@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599250}

android_webview/browser/DEPS

@@ -64,7 +64,6 @@ include_rules = [
   # AwContentBrowserClient::GetDefaultFavicon
   "!ui/resources/grit/ui_resources.h",
 
-
   # QuotaStatusCode required by AwQuotaManagerBridge.
   "+third_party/blink/public/mojom/quota",
   # Interface required for in-process input event handling.

android_webview/browser/aw_content_browser_client.cc

@@ -769,11 +769,12 @@ bool AwContentBrowserClient::WillCreateURLLoaderFactory(
   auto proxied_request = std::move(*factory_request);
   network::mojom::URLLoaderFactoryPtrInfo target_factory_info;
   *factory_request = mojo::MakeRequest(&target_factory_info);
+  int process_id = is_navigation ? 0 : frame->GetProcess()->GetID();
 
   // Android WebView has one non off-the-record browser context.
   base::PostTaskWithTraits(
       FROM_HERE, {content::BrowserThread::IO},
-      base::BindOnce(&AwProxyingURLLoaderFactory::CreateProxy,
+      base::BindOnce(&AwProxyingURLLoaderFactory::CreateProxy, process_id,
                      std::move(proxied_request), std::move(target_factory_info),
                      nullptr /* AwInterceptedRequestHandler */));
   return true;

android_webview/browser/aw_proxying_url_loader_factory.h

@@ -31,6 +31,7 @@ class AwInterceptedRequestHandler {};
 class AwProxyingURLLoaderFactory : public network::mojom::URLLoaderFactory {
  public:
   AwProxyingURLLoaderFactory(
+      int process_id,
       network::mojom::URLLoaderFactoryRequest loader_request,
       network::mojom::URLLoaderFactoryPtrInfo target_factory_info,
       std::unique_ptr<AwInterceptedRequestHandler> request_handler);
@@ -39,6 +40,7 @@ class AwProxyingURLLoaderFactory : public network::mojom::URLLoaderFactory {
 
   // static
   static void CreateProxy(
+      int process_id,
       network::mojom::URLLoaderFactoryRequest loader,
       network::mojom::URLLoaderFactoryPtrInfo target_factory_info,
       std::unique_ptr<AwInterceptedRequestHandler> request_handler);
@@ -58,6 +60,7 @@ class AwProxyingURLLoaderFactory : public network::mojom::URLLoaderFactory {
   void OnTargetFactoryError();
   void OnProxyBindingError();
 
+  const int process_id_;
   mojo::BindingSet<network::mojom::URLLoaderFactory> proxy_bindings_;
   network::mojom::URLLoaderFactoryPtr target_factory_;
 

testing/buildbot/filters/mojo.fyi.network_webview_instrumentation_test_apk.filter

@@ -120,11 +120,7 @@
 -org.chromium.android_webview.test.ClientOnReceivedErrorTest.testOnReceivedErrorOnInvalidUrl
 
 # https://crbug.com/891722
--org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testAfterRedirect
--org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testForMainResource
--org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testForSubresource
 -org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testForUserGesture
--org.chromium.android_webview.test.ClientOnReceivedHttpErrorTest.testNotCalledIfNoHttpError
 
 # https://crbug.com/893575
 -org.chromium.android_webview.test.CookieManagerStartupTest.testShouldInterceptRequestDeadlock