HTML MessagePort as mojo::MessagePipeHandle

content/child/blob_storage/webblobregistry_impl.cc

 // Copyright 2013 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/child/blob_storage/webblobregistry_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/guid.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "content/child/blob_storage/blob_consolidation.h"
 #include "content/child/blob_storage/blob_transport_controller.h"
 #include "content/child/child_thread_impl.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/common/fileapi/webblob_messages.h"
 #include "third_party/WebKit/public/platform/FilePathConversion.h"
 #include "third_party/WebKit/public/platform/WebBlobData.h"
 #include "third_party/WebKit/public/platform/WebString.h"
@@ skipping 79 matching lines @@
 void WebBlobRegistryImpl::addBlobDataRef(const WebString& uuid) {
   sender_->Send(new BlobHostMsg_IncrementRefCount(uuid.utf8()));
 }
 
 void WebBlobRegistryImpl::removeBlobDataRef(const WebString& uuid) {
   sender_->Send(new BlobHostMsg_DecrementRefCount(uuid.utf8()));
 }
 
 void WebBlobRegistryImpl::registerPublicBlobURL(const WebURL& url,
                                                 const WebString& uuid) {
+  // Measure how much jank the following synchronous IPC introduces.
+  SCOPED_UMA_HISTOGRAM_TIMER("Storage.Blob.RegisterPublicURLTime");
+
   sender_->Send(new BlobHostMsg_RegisterPublicURL(url, uuid.utf8()));
 }
 
 void WebBlobRegistryImpl::revokePublicBlobURL(const WebURL& url) {
   sender_->Send(new BlobHostMsg_RevokePublicURL(url));
 }
 
 // ------ streams stuff -----
 
 void WebBlobRegistryImpl::registerStreamURL(const WebURL& url,
@@ skipping 109 matching lines @@
                                     expected_modification_time);
 }
 
 void WebBlobRegistryImpl::BuilderImpl::build() {
   BlobTransportController::InitiateBlobTransfer(
       uuid_, content_type_, std::move(consolidation_), sender_,
       io_runner_.get(), main_runner_);
 }
 
 }  // namespace content