Implement chrome://view-http-cache with network service.

content/browser/webui/web_ui_url_loader_factory.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/webui/web_ui_url_loader_factory.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_piece.h"
 #include "content/browser/blob_storage/blob_internals_url_loader.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/histogram_internals_url_loader.h"
 #include "content/browser/resource_context_impl.h"
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/browser/webui/url_data_source_impl.h"
+#include "content/common/network_service.mojom.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/service_manager_connection.h"
+#include "content/public/common/service_names.mojom.h"
 #include "content/public/common/url_constants.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
+#include "services/service_manager/public/cpp/connector.h"
 #include "third_party/zlib/google/compression_utils.h"
 #include "ui/base/template_expressions.h"
 
 namespace content {
 
 namespace {
 
 class WebUIURLLoaderFactory;
 base::LazyInstance<std::map<int, std::unique_ptr<WebUIURLLoaderFactory>>>::Leaky
     g_factories = LAZY_INSTANCE_INITIALIZER;
@@ skipping 195 matching lines @@
   }
 
   // mojom::URLLoaderFactory implementation:
   void CreateLoaderAndStart(mojom::URLLoaderAssociatedRequest loader,
                             int32_t routing_id,
                             int32_t request_id,
                             uint32_t options,
                             const ResourceRequest& request,
                             mojom::URLLoaderClientPtr client) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
-    if (request.url.host_piece() == kChromeUIBlobInternalsHost) {
+    if (request.url.host_piece() == kChromeUINetworkViewCacheHost) {
+      mojom::NetworkServicePtr network_service;
+      ServiceManagerConnection::GetForProcess()->GetConnector()->BindInterface(
+          mojom::kNetworkServiceName, &network_service);
+      network_service->HandleViewCacheRequest(request, std::move(client));
+      return;
+    } else if (request.url.host_piece() == kChromeUIBlobInternalsHost) {

[mmenke, 2017/05/10 18:52:30]

optional nit:  I think the preferred style is not to use else when each branch
of an if ends with a return?

[jam, 2017/05/10 22:02:53]

Done.

       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           base::BindOnce(
               &StartBlobInternalsURLLoader, request, client.PassInterface(),
               base::Unretained(
                   ChromeBlobStorageContext::GetFor(browser_context_))));
       return;
     } else if (request.url.host_piece() == kChromeUIHistogramHost) {
       StartHistogramInternalsURLLoader(request, std::move(client));
       return;
@@ skipping 29 matching lines @@
 }  // namespace
 
 mojom::URLLoaderFactoryPtr GetWebUIURLLoader(FrameTreeNode* node) {
   int ftn_id = node->frame_tree_node_id();
   if (g_factories.Get()[ftn_id].get() == nullptr)
     g_factories.Get()[ftn_id] = base::MakeUnique<WebUIURLLoaderFactory>(node);
   return g_factories.Get()[ftn_id]->CreateBinding();
 }
 
 }  // namespace content