Use mojo for Chrome Loading, Part 1

content/child/resource_dispatcher.h

Index: content/child/resource_dispatcher.h
diff --git a/content/child/resource_dispatcher.h b/content/child/resource_dispatcher.h
index 11485286edaa714b04f92a3442c19b8627ff9773..5ef632fdf4b9f2499e1670359babd05ffbdedfd3 100644
--- a/content/child/resource_dispatcher.h
+++ b/content/child/resource_dispatcher.h
@@ -22,10 +22,12 @@
 #include "base/single_thread_task_runner.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
+#include "content/common/url_loader.mojom.h"
 #include "content/public/common/resource_type.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "net/base/request_priority.h"
+#include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "url/gurl.h"
 
 namespace net {
@@ -46,6 +48,10 @@ class SharedMemoryReceivedDataFactory;
 struct SiteIsolationResponseMetaData;
 struct SyncLoadResponse;
 
+namespace mojom {
+class URLLoaderFactory;
+}  // namespace mojom
+
 // This class serves as a communication interface to the ResourceDispatcherHost
 // in the browser process. It can be used from any child process.
 // Virtual methods are for tests.
@@ -68,14 +74,19 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
   // response parameter.
   virtual void StartSync(const RequestInfo& request_info,
                          ResourceRequestBodyImpl* request_body,
-                         SyncLoadResponse* response);
+                         SyncLoadResponse* response,
+                         blink::WebURLRequest::LoadingIPCType ipc_type,
+                         mojom::URLLoaderFactory* url_loader_factory);
 
   // Call this method to initiate the request. If this method succeeds, then
   // the peer's methods will be called asynchronously to report various events.
-  // Returns the request id.
+  // Returns the request id. |url_loader_factory| must be non-null if and only
+  // if |ipc_type| is LoadingIPCType::Mojo.
   virtual int StartAsync(const RequestInfo& request_info,
                          ResourceRequestBodyImpl* request_body,
-                         std::unique_ptr<RequestPeer> peer);
+                         std::unique_ptr<RequestPeer> peer,
+                         blink::WebURLRequest::LoadingIPCType ipc_type,
+                         mojom::URLLoaderFactory* url_loader_factory);
 
   // Removes a request from the |pending_requests_| list, returning true if the
   // request was found and removed.
@@ -119,6 +130,7 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
       scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter);
 
  private:
+  friend class URLResponseBodyConsumer;
   friend class ResourceDispatcherTest;
 
   typedef std::deque<IPC::Message*> MessageQueue;
@@ -155,6 +167,10 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
     scoped_refptr<SharedMemoryReceivedDataFactory> received_data_factory;
     std::unique_ptr<SiteIsolationResponseMetaData> site_isolation_metadata;
     int buffer_size;
+
+    // For mojo loading.
+    mojom::URLLoaderPtr url_loader;
+    std::unique_ptr<mojom::URLLoaderClient> url_loader_client;
   };
   using PendingRequestMap = std::map<int, std::unique_ptr<PendingRequestInfo>>;