[BlobAsync] Renderer support for blob file writing.

content/child/blob_storage/blob_transport_controller.h

Index: content/child/blob_storage/blob_transport_controller.h
diff --git a/content/child/blob_storage/blob_transport_controller.h b/content/child/blob_storage/blob_transport_controller.h
index c9c62ce55ba69e36a4b5bcd6f7ddcc52c421057e..ab970e0e538060d50e0ab450666b635d8b74c47a 100644
--- a/content/child/blob_storage/blob_transport_controller.h
+++ b/content/child/blob_storage/blob_transport_controller.h
@@ -12,6 +12,7 @@
 #include <string>
 #include <vector>
 
+#include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -24,6 +25,7 @@ namespace base {
 template <typename T>
 struct DefaultLazyInstanceTraits;
 class SingleThreadTaskRunner;
+class TaskRunner;
 }
 
 namespace storage {
@@ -53,6 +55,11 @@ class ThreadSafeSender;
 // Must be used on the IO thread.
 class CONTENT_EXPORT BlobTransportController {
  public:
+  using ResponseCallback = base::Callback<void(
+      const std::vector<storage::BlobItemBytesResponse>& /* responses */)>;
+  using CancelCallback =
+      base::Callback<void(storage::IPCBlobCreationCancelCode /* reason */)>;
+
   static BlobTransportController* GetInstance();
 
   // This kicks off a blob transfer to the browser thread, which involves
@@ -63,7 +70,7 @@ class CONTENT_EXPORT BlobTransportController {
   static void InitiateBlobTransfer(
       const std::string& uuid,
       const std::string& content_type,
-      std::unique_ptr<BlobConsolidation> consolidation,
+      scoped_refptr<BlobConsolidation> consolidation,
       scoped_refptr<ThreadSafeSender> sender,
       base::SingleThreadTaskRunner* io_runner,
       scoped_refptr<base::SingleThreadTaskRunner> main_runner);
@@ -74,7 +81,11 @@ class CONTENT_EXPORT BlobTransportController {
       const std::vector<storage::BlobItemBytesRequest>& requests,
       std::vector<base::SharedMemoryHandle>* memory_handles,
       const std::vector<IPC::PlatformFileForTransit>& file_handles,
-      IPC::Sender* sender);
+      IPC::Sender* sender,
+      scoped_refptr<base::TaskRunner> io_runner,
+      base::TaskRunner* file_runner,
+      const ResponseCallback& async_response_callback,
+      const CancelCallback& async_cancel_callback);
 
   void OnCancel(const std::string& uuid,
                 storage::IPCBlobCreationCancelCode code);
@@ -90,6 +101,7 @@ class CONTENT_EXPORT BlobTransportController {
   FRIEND_TEST_ALL_PREFIXES(BlobTransportControllerTest, Descriptions);
   FRIEND_TEST_ALL_PREFIXES(BlobTransportControllerTest, Responses);
   FRIEND_TEST_ALL_PREFIXES(BlobTransportControllerTest, SharedMemory);
+  FRIEND_TEST_ALL_PREFIXES(BlobTransportControllerTest, Disk);
   FRIEND_TEST_ALL_PREFIXES(BlobTransportControllerTest, ResponsesErrors);
 
   static void GetDescriptions(BlobConsolidation* consolidation,
@@ -106,13 +118,18 @@ class CONTENT_EXPORT BlobTransportController {
   enum class ResponsesStatus {
     BLOB_NOT_FOUND,
     SHARED_MEMORY_MAP_FAILED,
+    PENDING_IO,
     SUCCESS
   };
   friend struct base::DefaultLazyInstanceTraits<BlobTransportController>;
 
+  void CancelAsyncBlobTransfer(const CancelCallback& async_cancel_callback,
+                               const std::string& uuid,
+                               storage::IPCBlobCreationCancelCode code);
+
   void StoreBlobDataForRequests(
       const std::string& uuid,
-      std::unique_ptr<BlobConsolidation> consolidation,
+      scoped_refptr<BlobConsolidation> consolidation,
       scoped_refptr<base::SingleThreadTaskRunner> main_runner);
 
   ResponsesStatus GetResponses(
@@ -120,7 +137,11 @@ class CONTENT_EXPORT BlobTransportController {
       const std::vector<storage::BlobItemBytesRequest>& requests,
       std::vector<base::SharedMemoryHandle>* memory_handles,
       const std::vector<IPC::PlatformFileForTransit>& file_handles,
-      std::vector<storage::BlobItemBytesResponse>* output);
+      std::vector<storage::BlobItemBytesResponse>* output,
+      scoped_refptr<base::TaskRunner> io_runner,
+      base::TaskRunner* file_runner,
+      const ResponseCallback& response_callback,
+      const CancelCallback& error_callback);
 
   // Deletes the consolidation, and if we removed the last consolidation from
   // our map, we call ChildProcess::ReleaseProcess to release our previous
@@ -128,7 +149,7 @@ class CONTENT_EXPORT BlobTransportController {
   void ReleaseBlobConsolidation(const std::string& uuid);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner_;
-  std::map<std::string, std::unique_ptr<BlobConsolidation>> blob_storage_;
+  std::map<std::string, scoped_refptr<BlobConsolidation>> blob_storage_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobTransportController);
 };