Partially implement WorkerFetchContext and WorkerThreadableLoadingContext and add virtual tests

third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h

Index: third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h b/third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h
index a3e1fdf2fda4c53efb4a232bb5522623063e0e2f..057ad46b9fb7eeeb10dc2fa5e3d1022feb351423 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/ResourceRequest.h
@@ -318,6 +318,11 @@ class PLATFORM_EXPORT ResourceRequest final {
   }
   bool IsSameDocumentNavigation() const { return is_same_document_navigation_; }
 
+  void SetIsMojoIPCForced(bool is_mojo_ipc_forced) {
+    is_mojo_ipc_forced_ = is_mojo_ipc_forced;

[kinuko, 2017/05/12 08:41:45]

nit: maybe call this method OverrideIPCType() and pass kMojo?

[horo, 2017/05/12 09:06:02]

Done.

+  }
+  bool IsMojoIPCForced() const { return is_mojo_ipc_forced_; }
+
  private:
   const CacheControlHeader& GetCacheControlHeader() const;
 
@@ -368,6 +373,8 @@ class PLATFORM_EXPORT ResourceRequest final {
   RedirectStatus redirect_status_;
 
   double navigation_start_ = 0;
+
+  bool is_mojo_ipc_forced_ = false;
 };
 
 struct CrossThreadResourceRequestData {