[BlobAsync] Disk support for blob storage

content/browser/blob_storage/blob_dispatcher_host_unittest.cc

Index: content/browser/blob_storage/blob_dispatcher_host_unittest.cc
diff --git a/content/browser/blob_storage/blob_dispatcher_host_unittest.cc b/content/browser/blob_storage/blob_dispatcher_host_unittest.cc
index ccd53246c449c74f707c05c0ebed4184deb0c543..b1ed562a82d9fbbb83bd7b6bfd1507e6395bcc17 100644
--- a/content/browser/blob_storage/blob_dispatcher_host_unittest.cc
+++ b/content/browser/blob_storage/blob_dispatcher_host_unittest.cc
@@ -11,6 +11,7 @@
 #include "base/command_line.h"
 #include "base/memory/shared_memory.h"
 #include "base/run_loop.h"
+#include "base/strings/string_number_conversions.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/common/fileapi/webblob_messages.h"
 #include "content/public/common/content_switches.h"
@@ -49,7 +50,11 @@ const size_t kDataSize = 6;
 
 const size_t kTestBlobStorageIPCThresholdBytes = 20;
 const size_t kTestBlobStorageMaxSharedMemoryBytes = 50;
-const uint64_t kTestBlobStorageMaxFileSizeBytes = 100;
+const size_t kTestBlobStorageMaxBlobMemorySize = 400;
+const size_t kTestBlobStorageMaxMemoryUsage = 500;
+const uint64_t kTestBlobStorageMaxDiskSpace = 1000;
+const size_t kTestBlobStorageInFlightMemory = 10;
+const uint64_t kTestBlobStorageMinFileSizeBytes = 10;
 
 void ConstructionCompletePopulator(bool* succeeded_pointer,
                                    IPCBlobCreationCancelCode* reason_pointer,
@@ -63,11 +68,7 @@ class TestableBlobDispatcherHost : public BlobDispatcherHost {
  public:
   TestableBlobDispatcherHost(ChromeBlobStorageContext* blob_storage_context,
                              IPC::TestSink* sink)
-      : BlobDispatcherHost(blob_storage_context), sink_(sink) {
-    this->SetMemoryConstantsForTesting(kTestBlobStorageIPCThresholdBytes,
-                                       kTestBlobStorageMaxSharedMemoryBytes,
-                                       kTestBlobStorageMaxFileSizeBytes);
-  }
+      : BlobDispatcherHost(blob_storage_context), sink_(sink) {}
 
   bool Send(IPC::Message* message) override { return sink_->Send(message); }
 
@@ -83,6 +84,12 @@ class TestableBlobDispatcherHost : public BlobDispatcherHost {
 
   IPC::TestSink* sink_;
 };
+//
+// void SetElementToCharBytes(DataElement* element, char byte, size_t size) {
+//  std::vector<char> data(size);
+//  data.assign(size, byte);
+//  element->SetToBytes(data.data(), size);
+//}
 
 }  // namespace
 
@@ -104,6 +111,11 @@ class BlobDispatcherHostTest : public testing::Test {
     // We run the run loop to initialize the chrome blob storage context.
     base::RunLoop().RunUntilIdle();
     context_ = chrome_blob_storage_context_->context();
+    context_->mutable_memory_controller()->SetMemoryContantsForTesting(
+        kTestBlobStorageIPCThresholdBytes, kTestBlobStorageMaxSharedMemoryBytes,
+        kTestBlobStorageMaxBlobMemorySize, kTestBlobStorageMaxMemoryUsage,
+        kTestBlobStorageMaxDiskSpace, kTestBlobStorageInFlightMemory,
+        kTestBlobStorageMinFileSizeBytes);
     DCHECK(context_);
   }
 
@@ -116,14 +128,11 @@ class BlobDispatcherHostTest : public testing::Test {
   void AsyncShortcutBlobTransfer(const std::string& id) {
     sink_.ClearMessages();
     ExpectBlobNotExist(id);
-    host_->OnRegisterBlobUUID(id, std::string(kContentType),
-                              std::string(kContentDisposition),
-                              std::set<std::string>());
-    EXPECT_FALSE(host_->shutdown_for_bad_message_);
     DataElement element;
     element.SetToBytes(kData, kDataSize);
     std::vector<DataElement> elements = {element};
-    host_->OnStartBuildingBlob(id, elements);
+    host_->OnRegisterBlob(id, std::string(kContentType),
+                          std::string(kContentDisposition), elements);
     EXPECT_FALSE(host_->shutdown_for_bad_message_);
     ExpectDone(id);
     sink_.ClearMessages();
@@ -132,14 +141,11 @@ class BlobDispatcherHostTest : public testing::Test {
   void AsyncBlobTransfer(const std::string& id) {
     sink_.ClearMessages();
     ExpectBlobNotExist(id);
-    host_->OnRegisterBlobUUID(id, std::string(kContentType),
-                              std::string(kContentDisposition),
-                              std::set<std::string>());
-    EXPECT_FALSE(host_->shutdown_for_bad_message_);
     DataElement element;
     element.SetToBytesDescription(kDataSize);
     std::vector<DataElement> elements = {element};
-    host_->OnStartBuildingBlob(id, elements);
+    host_->OnRegisterBlob(id, std::string(kContentType),
+                          std::string(kContentDisposition), elements);
     EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
     // Expect our request.
@@ -254,6 +260,10 @@ class BlobDispatcherHostTest : public testing::Test {
     return host_->async_builder_.IsBeingBuilt(uuid);
   }
 
+  bool IsBeingBuiltInContext(const std::string& uuid) {
+    return context_->IsBeingBuilt(uuid);
+  }
+
   IPC::TestSink sink_;
   TestBrowserThreadBundle browser_thread_bundle_;
   TestBrowserContext browser_context_;
@@ -263,9 +273,7 @@ class BlobDispatcherHostTest : public testing::Test {
 };
 
 TEST_F(BlobDispatcherHostTest, EmptyUUIDs) {
-  host_->OnRegisterBlobUUID("", "", "", std::set<std::string>());
-  ExpectAndResetBadMessage();
-  host_->OnStartBuildingBlob("", std::vector<DataElement>());
+  host_->OnRegisterBlob("", "", "", std::vector<DataElement>());
   ExpectAndResetBadMessage();
   host_->OnMemoryItemResponse("", std::vector<BlobItemBytesResponse>());
   ExpectAndResetBadMessage();
@@ -302,23 +310,16 @@ TEST_F(BlobDispatcherHostTest, RegularTransfer) {
 TEST_F(BlobDispatcherHostTest, MultipleTransfers) {
   const std::string kId = "uuid";
   const int kNumIters = 10;
-  for (int i = 0; i < kNumIters; i++) {
-    std::string id = kId;
-    id += ('0' + i);
-    ExpectBlobNotExist(id);
-    host_->OnRegisterBlobUUID(id, std::string(kContentType),
-                              std::string(kContentDisposition),
-                              std::set<std::string>());
-    EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  }
   sink_.ClearMessages();
   for (int i = 0; i < kNumIters; i++) {
     std::string id = kId;
     id += ('0' + i);
+    ExpectBlobNotExist(id);
     DataElement element;
     element.SetToBytesDescription(kDataSize);
     std::vector<DataElement> elements = {element};
-    host_->OnStartBuildingBlob(id, elements);
+    host_->OnRegisterBlob(id, std::string(kContentType),
+                          std::string(kContentDisposition), elements);
     EXPECT_FALSE(host_->shutdown_for_bad_message_);
     // Expect our request.
     std::vector<BlobItemBytesRequest> expected_requests = {
@@ -345,9 +346,12 @@ TEST_F(BlobDispatcherHostTest, SharedMemoryTransfer) {
   std::vector<base::SharedMemoryHandle> shared_memory_handles;
 
   ExpectBlobNotExist(kId);
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  DataElement element;
+  element.SetToBytesDescription(kLargeSize);
+  std::vector<DataElement> elements = {element};
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+  EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
   // Grab the handle.
   std::unique_ptr<BlobDataHandle> blob_data_handle =
@@ -359,11 +363,6 @@ TEST_F(BlobDispatcherHostTest, SharedMemoryTransfer) {
   EXPECT_FALSE(built);
 
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  DataElement element;
-  element.SetToBytesDescription(kLargeSize);
-  std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
   // Expect our first request.
   std::vector<BlobItemBytesRequest> expected_requests = {
@@ -442,14 +441,11 @@ TEST_F(BlobDispatcherHostTest, OnCancelBuildingBlob) {
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
   // Start building blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
   DataElement element;
   element.SetToBytesDescription(kDataSize);
   std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   // It should have requested memory here.
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
   sink_.ClearMessages();
@@ -515,9 +511,11 @@ TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructing) {
   const std::string kId("id");
 
   // Start building blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  DataElement element;
+  element.SetToBytesDescription(kDataSize);
+  std::vector<DataElement> elements = {element};
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
 
   // Grab the handle.
   std::unique_ptr<BlobDataHandle> blob_data_handle =
@@ -529,11 +527,6 @@ TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructing) {
   blob_data_handle->RunOnConstructionComplete(
       base::Bind(&ConstructionCompletePopulator, &built, &error_code));
 
-  // Continue building.
-  DataElement element;
-  element.SetToBytesDescription(kDataSize);
-  std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
   sink_.ClearMessages();
 
   // Send data.
@@ -548,41 +541,15 @@ TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructing) {
   EXPECT_TRUE(built) << "Error code: " << static_cast<int>(error_code);
 }
 
-TEST_F(BlobDispatcherHostTest, BlobReferenceWhileShortcutConstructing) {
+TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructingCancelled) {
   const std::string kId("id");
 
   // Start building blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-
-  // Grab the handle.
-  std::unique_ptr<BlobDataHandle> blob_data_handle =
-      context_->GetBlobDataFromUUID(kId);
-  EXPECT_TRUE(blob_data_handle);
-  EXPECT_TRUE(blob_data_handle->IsBeingBuilt());
-  bool built = false;
-  IPCBlobCreationCancelCode error_code = IPCBlobCreationCancelCode::UNKNOWN;
-  blob_data_handle->RunOnConstructionComplete(
-      base::Bind(&ConstructionCompletePopulator, &built, &error_code));
-
-  // Continue building.
   DataElement element;
-  element.SetToBytes(kData, kDataSize);
+  element.SetToBytesDescription(kDataSize);
   std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
-  ExpectDone(kId);
-  base::RunLoop().RunUntilIdle();
-  EXPECT_TRUE(built) << "Error code: " << static_cast<int>(error_code);
-}
-
-TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructingCancelled) {
-  const std::string kId("id");
-
-  // Start building blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
 
   // Grab the handle.
   std::unique_ptr<BlobDataHandle> blob_data_handle =
@@ -618,59 +585,15 @@ TEST_F(BlobDispatcherHostTest, BlobReferenceWhileConstructingCancelled) {
   ExpectBlobNotExist(kId);
 }
 
-TEST_F(BlobDispatcherHostTest, DecrementRefAfterRegister) {
-  const std::string kId("id");
-  // Decrement the refcount while building (renderer blob gc'd before
-  // construction was completed).
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  EXPECT_TRUE(context_->registry().HasEntry(kId));
-  host_->OnDecrementBlobRefCount(kId);
-  EXPECT_FALSE(context_->registry().HasEntry(kId));
-  EXPECT_FALSE(IsBeingBuiltInHost(kId));
-  ExpectCancel(kId,
-               IPCBlobCreationCancelCode::BLOB_DEREFERENCED_WHILE_BUILDING);
-  sink_.ClearMessages();
-
-  // Do the same, but this time grab a handle before we decrement.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  std::unique_ptr<BlobDataHandle> blob_data_handle =
-      context_->GetBlobDataFromUUID(kId);
-  host_->OnDecrementBlobRefCount(kId);
-  EXPECT_TRUE(context_->registry().HasEntry(kId));
-  EXPECT_TRUE(IsBeingBuiltInHost(kId));
-
-  // Finish up the blob, and verify we got the done message.
-  DataElement element;
-  element.SetToBytes(kData, kDataSize);
-  std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  ExpectDone(kId);
-  sink_.ClearMessages();
-  // Get rid of the handle, and verify it's gone.
-  blob_data_handle.reset();
-  base::RunLoop().RunUntilIdle();
-  // Check that it's no longer around.
-  EXPECT_FALSE(context_->registry().HasEntry(kId));
-  EXPECT_FALSE(IsBeingBuiltInHost(kId));
-}
-
 TEST_F(BlobDispatcherHostTest, DecrementRefAfterOnStart) {
   const std::string kId("id");
 
   // Decrement the refcount while building, after we call OnStartBuildlingBlob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
   DataElement element;
   element.SetToBytesDescription(kDataSize);
   std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
   std::vector<BlobItemBytesRequest> expected_requests = {
@@ -686,11 +609,8 @@ TEST_F(BlobDispatcherHostTest, DecrementRefAfterOnStart) {
   sink_.ClearMessages();
 
   // Do the same, but this time grab a handle to keep it alive.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
   ExpectRequest(kId, expected_requests);
   sink_.ClearMessages();
@@ -725,9 +645,11 @@ TEST_F(BlobDispatcherHostTest, DecrementRefAfterOnStartWithHandle) {
   const std::string kId("id");
   // Decrement the refcount while building, after we call
   // OnStartBuildlingBlob, except we have another handle.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  DataElement element;
+  element.SetToBytesDescription(kDataSize);
+  std::vector<DataElement> elements = {element};
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
 
   std::unique_ptr<BlobDataHandle> blob_data_handle =
@@ -738,12 +660,6 @@ TEST_F(BlobDispatcherHostTest, DecrementRefAfterOnStartWithHandle) {
   blob_data_handle->RunOnConstructionComplete(
       base::Bind(&ConstructionCompletePopulator, &built, &error_code));
 
-  DataElement element;
-  element.SetToBytesDescription(kDataSize);
-  std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
-
   // Check that we got the expected request.
   std::vector<BlobItemBytesRequest> expected_requests = {
       BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize)};
@@ -775,52 +691,15 @@ TEST_F(BlobDispatcherHostTest, DecrementRefAfterOnStartWithHandle) {
   EXPECT_FALSE(context_->registry().HasEntry(kId));
 }
 
-TEST_F(BlobDispatcherHostTest, HostDisconnectAfterRegisterWithHandle) {
-  const std::string kId("id");
-
-  // Delete host with a handle to the blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-
-  std::unique_ptr<BlobDataHandle> blob_data_handle =
-      context_->GetBlobDataFromUUID(kId);
-  EXPECT_TRUE(blob_data_handle->IsBeingBuilt());
-  bool built = true;
-  IPCBlobCreationCancelCode error_code = IPCBlobCreationCancelCode::UNKNOWN;
-  blob_data_handle->RunOnConstructionComplete(
-      base::Bind(&ConstructionCompletePopulator, &built, &error_code));
-  // Get rid of host, which was doing the constructing.
-  host_ = nullptr;
-  EXPECT_FALSE(blob_data_handle->IsBeingBuilt());
-  base::RunLoop().RunUntilIdle();
-  EXPECT_FALSE(built);
-  EXPECT_EQ(IPCBlobCreationCancelCode::SOURCE_DIED_IN_TRANSIT, error_code);
-
-  // Should still be there due to the handle.
-  std::unique_ptr<BlobDataHandle> another_handle =
-      context_->GetBlobDataFromUUID(kId);
-  EXPECT_TRUE(another_handle);
-
-  // Should disappear after dropping both handles.
-  blob_data_handle.reset();
-  another_handle.reset();
-  base::RunLoop().RunUntilIdle();
-  EXPECT_FALSE(context_->registry().HasEntry(kId));
-}
-
 TEST_F(BlobDispatcherHostTest, HostDisconnectAfterOnStart) {
   const std::string kId("id");
 
   // Host deleted after OnStartBuilding.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-
   DataElement element;
   element.SetToBytesDescription(kDataSize);
   std::vector<DataElement> elements = {element};
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
 
   std::vector<BlobItemBytesRequest> expected_requests = {
       BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize)};
@@ -836,15 +715,13 @@ TEST_F(BlobDispatcherHostTest, HostDisconnectAfterOnMemoryResponse) {
   const std::string kId("id");
 
   // Host deleted after OnMemoryItemResponse.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-
-  // Create list of two items.
   DataElement element;
   element.SetToBytesDescription(kDataSize);
   std::vector<DataElement> elements = {element, element};
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+
+  // Create list of two items.
   std::vector<BlobItemBytesRequest> expected_requests = {
       BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize),
       BlobItemBytesRequest::CreateIPCRequest(1, 1, 0, kDataSize)};
@@ -869,37 +746,37 @@ TEST_F(BlobDispatcherHostTest, CreateBlobWithBrokenReference) {
 
   // First, let's test a circular reference.
   const std::string kCircularId("id1");
-  host_->OnRegisterBlobUUID(kCircularId, std::string(kContentType),
-                            std::string(kContentDisposition), {kCircularId});
+  DataElement element;
+  element.SetToBlob(kCircularId);
+  std::vector<DataElement> elements = {element};
+  host_->OnRegisterBlob(kCircularId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   ExpectAndResetBadMessage();
 
   // Next, test a blob that references a broken blob.
-  host_->OnRegisterBlobUUID(kBrokenId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  element.SetToBytesDescription(kDataSize);
+  elements = {element};
+  host_->OnRegisterBlob(kBrokenId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+  sink_.ClearMessages();
   host_->OnCancelBuildingBlob(kBrokenId, IPCBlobCreationCancelCode::UNKNOWN);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
   EXPECT_TRUE(context_->GetBlobDataFromUUID(kBrokenId)->IsBroken());
 
   // Create referencing blob. We should be broken right away, but also ignore
   // the subsequent OnStart message.
-  host_->OnRegisterBlobUUID(kReferencingId, std::string(kContentType),
-                            std::string(kContentDisposition), {kBrokenId});
+  element.SetToBytesDescription(kDataSize);
+  elements = {element};
+  element.SetToBlob(kBrokenId);
+  elements.push_back(element);
+  host_->OnRegisterBlob(kReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   EXPECT_TRUE(context_->GetBlobDataFromUUID(kReferencingId)->IsBroken());
   EXPECT_FALSE(IsBeingBuiltInHost(kReferencingId));
   EXPECT_TRUE(context_->registry().HasEntry(kReferencingId));
   ExpectCancel(kReferencingId,
                IPCBlobCreationCancelCode::REFERENCED_BLOB_BROKEN);
   sink_.ClearMessages();
-
-  DataElement element;
-  element.SetToBytesDescription(kDataSize);
-  std::vector<DataElement> elements = {element};
-  element.SetToBlob(kBrokenId);
-  elements.push_back(element);
-  host_->OnStartBuildingBlob(kReferencingId, elements);
-  EXPECT_EQ(0u, sink_.message_count());
-  base::RunLoop().RunUntilIdle();
 }
 
 TEST_F(BlobDispatcherHostTest, DeferenceBlobOnDifferentHost) {
@@ -922,41 +799,21 @@ TEST_F(BlobDispatcherHostTest, DeferenceBlobOnDifferentHost) {
   // verify that a building message from the renderer will kill it.
 
   // Test OnStartBuilding after double dereference.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
-  host2->OnIncrementBlobRefCount(kId);
-  host_->OnDecrementBlobRefCount(kId);
-  EXPECT_FALSE(host_->IsInUseInHost(kId));
-  host2->OnDecrementBlobRefCount(kId);
-  // So no more blob in the context, but we're still being built in host 1.
-  EXPECT_FALSE(context_->registry().HasEntry(kId));
-  EXPECT_TRUE(host_->async_builder_.IsBeingBuilt(kId));
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  // We should be cleaned up.
-  EXPECT_FALSE(host_->async_builder_.IsBeingBuilt(kId));
-  ExpectCancel(kId,
-               IPCBlobCreationCancelCode::BLOB_DEREFERENCED_WHILE_BUILDING);
+  ExpectRequest(kId, expected_requests);
   sink_.ClearMessages();
-
-  // Same as above, but test OnMemoryItemResponse after double dereference.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
   host2->OnIncrementBlobRefCount(kId);
   host_->OnDecrementBlobRefCount(kId);
   EXPECT_FALSE(host_->IsInUseInHost(kId));
-  host_->OnStartBuildingBlob(kId, elements);
-  ExpectRequest(kId, expected_requests);
-  sink_.ClearMessages();
-
   host2->OnDecrementBlobRefCount(kId);
   // So no more blob in the context, but we're still being built in host 1.
   EXPECT_FALSE(context_->registry().HasEntry(kId));
+  // Send the memory. When the host sees the entry doesn't exist, it should
+  // cancel and clean up.
   EXPECT_TRUE(host_->async_builder_.IsBeingBuilt(kId));
   host_->OnMemoryItemResponse(kId, responses);
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
   // We should be cleaned up.
   EXPECT_FALSE(host_->async_builder_.IsBeingBuilt(kId));
   ExpectCancel(kId,
@@ -964,13 +821,11 @@ TEST_F(BlobDispatcherHostTest, DeferenceBlobOnDifferentHost) {
   sink_.ClearMessages();
 
   // Same, but now for OnCancel.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
   host2->OnIncrementBlobRefCount(kId);
   host_->OnDecrementBlobRefCount(kId);
   EXPECT_FALSE(host_->IsInUseInHost(kId));
-  host_->OnStartBuildingBlob(kId, elements);
   ExpectRequest(kId, expected_requests);
   sink_.ClearMessages();
 
@@ -990,12 +845,16 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChain) {
   const std::string kDifferentHostReferencingId("id3");
   // Data elements for our transfer & checking messages.
   DataElement element;
-  element.SetToBytes(kData, kDataSize);
-  std::vector<DataElement> elements = {element};
+  element.SetToBytesDescription(kDataSize);
   DataElement referencing_element;
   referencing_element.SetToBlob(kId);
+  std::vector<DataElement> elements = {element};
   std::vector<DataElement> referencing_elements = {referencing_element};
-  std::set<std::string> referenced_blobs_set = {kId};
+  std::vector<BlobItemBytesRequest> expected_requests = {
+      BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize)};
+  BlobItemBytesResponse response(0);
+  std::memcpy(response.allocate_mutable_data(kDataSize), kData, kDataSize);
+  std::vector<BlobItemBytesResponse> responses = {response};
 
   scoped_refptr<TestableBlobDispatcherHost> host2(
       new TestableBlobDispatcherHost(chrome_blob_storage_context_, &sink_));
@@ -1005,34 +864,37 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChain) {
   // after the referenced blob is finished.
 
   // First we start the referenced blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+  ExpectRequest(kId, expected_requests);
+  sink_.ClearMessages();
   EXPECT_TRUE(host_->IsInUseInHost(kId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kId));
 
   // Next we start the referencing blobs in both the same and different host.
-  host_->OnRegisterBlobUUID(kSameHostReferencingId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            referenced_blobs_set);
-  EXPECT_FALSE(host_->shutdown_for_bad_message_);
-  host_->OnStartBuildingBlob(kSameHostReferencingId, referencing_elements);
+  host_->OnRegisterBlob(kSameHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
   EXPECT_FALSE(host_->shutdown_for_bad_message_);
   ExpectDone(kSameHostReferencingId);
-  EXPECT_TRUE(host_->async_builder_.IsBeingBuilt(kSameHostReferencingId));
   sink_.ClearMessages();
+  EXPECT_FALSE(
+      context_->GetBlobDataFromUUID(kSameHostReferencingId)->IsBroken());
+  EXPECT_FALSE(host_->async_builder_.IsBeingBuilt(kSameHostReferencingId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kSameHostReferencingId));
+
   // Now the other host.
-  host2->OnRegisterBlobUUID(
-      kDifferentHostReferencingId, std::string(kContentType),
-      std::string(kContentDisposition), referenced_blobs_set);
-  EXPECT_FALSE(host2->shutdown_for_bad_message_);
-  host2->OnStartBuildingBlob(kDifferentHostReferencingId, referencing_elements);
+  host2->OnRegisterBlob(kDifferentHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
   EXPECT_FALSE(host2->shutdown_for_bad_message_);
   ExpectDone(kDifferentHostReferencingId);
-  EXPECT_TRUE(host2->async_builder_.IsBeingBuilt(kDifferentHostReferencingId));
   sink_.ClearMessages();
+  EXPECT_FALSE(
+      context_->GetBlobDataFromUUID(kDifferentHostReferencingId)->IsBroken());
+  EXPECT_FALSE(host2->async_builder_.IsBeingBuilt(kDifferentHostReferencingId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kDifferentHostReferencingId));
 
   // Now we finish the first blob, and we expect all blobs to finish.
-  host_->OnStartBuildingBlob(kId, elements);
+  host_->OnMemoryItemResponse(kId, responses);
   ExpectDone(kId);
   // We need to run the message loop to propagate the construction callbacks.
   base::RunLoop().RunUntilIdle();
@@ -1047,7 +909,10 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChain) {
   // Finally check that our data is correct in the child elements.
   std::unique_ptr<BlobDataHandle> handle =
       context_->GetBlobDataFromUUID(kDifferentHostReferencingId);
-  ExpectHandleEqualsData(handle.get(), elements);
+  DataElement expected;
+  expected.SetToBytes(kData, kDataSize);
+  std::vector<DataElement> expecteds = {expected};
+  ExpectHandleEqualsData(handle.get(), expecteds);
 }
 
 TEST_F(BlobDispatcherHostTest, BuildingReferenceChainWithCancel) {
@@ -1055,40 +920,52 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChainWithCancel) {
   const std::string kSameHostReferencingId("id2");
   const std::string kDifferentHostReferencingId("id3");
   // Data elements for our transfer & checking messages.
+  DataElement element;
+  element.SetToBytesDescription(kDataSize);
   DataElement referencing_element;
   referencing_element.SetToBlob(kId);
+  std::vector<DataElement> elements = {element};
   std::vector<DataElement> referencing_elements = {referencing_element};
-  std::set<std::string> referenced_blobs_set = {kId};
+  std::vector<BlobItemBytesRequest> expected_requests = {
+      BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize)};
 
   scoped_refptr<TestableBlobDispatcherHost> host2(
       new TestableBlobDispatcherHost(chrome_blob_storage_context_, &sink_));
 
   // We want to have a blob referencing another blob that is building, both on
-  // the same host and a different host. After we cancel the first blob, the
-  // others should cancel as well.
+  // the same host and a different host. We should successfully build all blobs
+  // after the referenced blob is finished.
 
   // First we start the referenced blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+  ExpectRequest(kId, expected_requests);
+  sink_.ClearMessages();
   EXPECT_TRUE(host_->IsInUseInHost(kId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kId));
 
   // Next we start the referencing blobs in both the same and different host.
-  host_->OnRegisterBlobUUID(kSameHostReferencingId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            referenced_blobs_set);
-  host_->OnStartBuildingBlob(kSameHostReferencingId, referencing_elements);
+  host_->OnRegisterBlob(kSameHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
+  EXPECT_FALSE(host_->shutdown_for_bad_message_);
   ExpectDone(kSameHostReferencingId);
-  EXPECT_TRUE(host_->async_builder_.IsBeingBuilt(kSameHostReferencingId));
   sink_.ClearMessages();
+  EXPECT_FALSE(
+      context_->GetBlobDataFromUUID(kSameHostReferencingId)->IsBroken());
+  EXPECT_FALSE(host_->async_builder_.IsBeingBuilt(kSameHostReferencingId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kSameHostReferencingId));
+
   // Now the other host.
-  host2->OnRegisterBlobUUID(
-      kDifferentHostReferencingId, std::string(kContentType),
-      std::string(kContentDisposition), referenced_blobs_set);
-  host2->OnStartBuildingBlob(kDifferentHostReferencingId, referencing_elements);
+  host2->OnRegisterBlob(kDifferentHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
+  EXPECT_FALSE(host2->shutdown_for_bad_message_);
   ExpectDone(kDifferentHostReferencingId);
-  EXPECT_TRUE(host2->async_builder_.IsBeingBuilt(kDifferentHostReferencingId));
   sink_.ClearMessages();
+  EXPECT_FALSE(
+      context_->GetBlobDataFromUUID(kDifferentHostReferencingId)->IsBroken());
+  EXPECT_FALSE(host2->async_builder_.IsBeingBuilt(kDifferentHostReferencingId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kDifferentHostReferencingId));
+
   bool built = false;
   IPCBlobCreationCancelCode error_code = IPCBlobCreationCancelCode::UNKNOWN;
   context_->GetBlobDataFromUUID(kDifferentHostReferencingId)
@@ -1115,39 +992,45 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChainWithSourceDeath) {
   const std::string kSameHostReferencingId("id2");
   const std::string kDifferentHostReferencingId("id3");
   // Data elements for our transfer & checking messages.
+  DataElement element;
+  element.SetToBytesDescription(kDataSize);
   DataElement referencing_element;
   referencing_element.SetToBlob(kId);
+  std::vector<DataElement> elements = {element};
   std::vector<DataElement> referencing_elements = {referencing_element};
-  std::set<std::string> referenced_blobs_set = {kId};
+  std::vector<BlobItemBytesRequest> expected_requests = {
+      BlobItemBytesRequest::CreateIPCRequest(0, 0, 0, kDataSize)};
+  BlobItemBytesResponse response(0);
+  std::memcpy(response.allocate_mutable_data(kDataSize), kData, kDataSize);
+  std::vector<BlobItemBytesResponse> responses = {response};
 
   scoped_refptr<TestableBlobDispatcherHost> host2(
       new TestableBlobDispatcherHost(chrome_blob_storage_context_, &sink_));
 
   // We want to have a blob referencing another blob that is building, both on
-  // the same host and a different host. When we destroy the host, the other
-  // blob should cancel, as well as the blob on the other host.
+  // the same host and a different host. We should successfully build all blobs
+  // after the referenced blob is finished.
 
   // First we start the referenced blob.
-  host_->OnRegisterBlobUUID(kId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            std::set<std::string>());
+  host_->OnRegisterBlob(kId, std::string(kContentType),
+                        std::string(kContentDisposition), elements);
+  ExpectRequest(kId, expected_requests);
+  sink_.ClearMessages();
   EXPECT_TRUE(host_->IsInUseInHost(kId));
+  EXPECT_TRUE(IsBeingBuiltInContext(kId));
 
   // Next we start the referencing blobs in both the same and different host.
-  host_->OnRegisterBlobUUID(kSameHostReferencingId, std::string(kContentType),
-                            std::string(kContentDisposition),
-                            referenced_blobs_set);
-  host_->OnStartBuildingBlob(kSameHostReferencingId, referencing_elements);
+  host_->OnRegisterBlob(kSameHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
+  EXPECT_FALSE(host_->shutdown_for_bad_message_);
   ExpectDone(kSameHostReferencingId);
-  EXPECT_TRUE(host_->async_builder_.IsBeingBuilt(kSameHostReferencingId));
   sink_.ClearMessages();
+
   // Now the other host.
-  host2->OnRegisterBlobUUID(
-      kDifferentHostReferencingId, std::string(kContentType),
-      std::string(kContentDisposition), referenced_blobs_set);
-  host2->OnStartBuildingBlob(kDifferentHostReferencingId, referencing_elements);
+  host2->OnRegisterBlob(kDifferentHostReferencingId, std::string(kContentType),
+                        std::string(kContentDisposition), referencing_elements);
+  EXPECT_FALSE(host2->shutdown_for_bad_message_);
   ExpectDone(kDifferentHostReferencingId);
-  EXPECT_TRUE(host2->async_builder_.IsBeingBuilt(kDifferentHostReferencingId));
   sink_.ClearMessages();
 
   // Grab handles & add listeners.
@@ -1197,5 +1080,54 @@ TEST_F(BlobDispatcherHostTest, BuildingReferenceChainWithSourceDeath) {
 
   sink_.ClearMessages();
 }
+//
+// TEST_F(BlobDispatcherHostTest, BlobChaos) {
+//  DataElement element;
+//  element.SetToBytesDescription(kTestBlobStorageMaxMemoryUsage / 3 + 1);
+//  std::vector<DataElement> elements = {element};
+//
+//  int memory_left = kTestBlobStorageMaxDiskSpace
+//      + kTestBlobStorageMaxDiskSpace;
+//
+//  // Option 1:
+//  // * shortcut
+//  // * shared mem
+//  // * multiple shared mem
+//
+//  for (int i = 0; i < 1000; i++) {
+//    std::string id = base::IntToString(i);
+//    int option1 = i % 3;
+//    size_t size;
+//    switch(option1) {
+//      case 0:
+//        size = kTestBlobStorageIPCThresholdBytes;
+//        break;
+//      case 1:
+//        size = kTestBlobStorageMaxSharedMemoryBytes;
+//        break;
+//      case 2:
+//        size = kTestBlobStorageMaxSharedMemoryBytes * 3 + 1;
+//        break;
+//    }
+//    if (memory_left - size <= 0) {
+//      break;
+//    }
+//    DataElement element;
+//    std::vector<DataElement> elements;
+//    if (option1 == 0) {
+//      SetElementToCharBytes(&element, 'z', size);
+//    } else {
+//      element.SetToBytesDescription(size);
+//    }
+//    elements.push_back(element);
+//
+//    host_->OnRegisterBlob(id, std::string(kContentType),
+//                          std::string(kContentDisposition), elements);
+//  }
+//
+//  for (int i = 0; i < sink_.message_count(); i++) {
+//
+//  }
+//}
 
 }  // namespace content