Expose API to store and load data usage stats from UI task runner.

android_webview/browser/aw_browser_context.cc

 // Copyright (c) 2012 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 "android_webview/browser/aw_browser_context.h"
 
 #include "android_webview/browser/aw_form_database_service.h"
 #include "android_webview/browser/aw_permission_manager.h"
 #include "android_webview/browser/aw_pref_store.h"
 #include "android_webview/browser/aw_quota_manager_bridge.h"
 #include "android_webview/browser/aw_resource_context.h"
 #include "android_webview/browser/jni_dependency_factory.h"
 #include "android_webview/browser/net/aw_url_request_context_getter.h"
 #include "android_webview/browser/net/init_native_callback.h"
 #include "android_webview/common/aw_content_client.h"
 #include "base/base_paths_android.h"
 #include "base/bind.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_service_factory.h"
 #include "components/autofill/core/common/autofill_pref_names.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_prefs.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h"
+#include "components/data_reduction_proxy/core/browser/data_store.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
 #include "components/user_prefs/user_prefs.h"
 #include "components/visitedlink/browser/visitedlink_master.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/ssl_host_state_delegate.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "net/cookies/cookie_store.h"
 #include "net/proxy/proxy_config_service_android.h"
 #include "net/proxy/proxy_service.h"
@@ skipping 122 matching lines @@
           data_reduction_proxy::Client::WEBVIEW_ANDROID,
           data_reduction_proxy::DataReductionProxyParams::kAllowed,
           url_request_context_getter_->GetNetLog(),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI),
           false /* enable */,
           false /* enable_quic */,
           GetUserAgent()));
   data_reduction_proxy_settings_.reset(
       new data_reduction_proxy::DataReductionProxySettings());
+  scoped_ptr<data_reduction_proxy::DataStore> store(
+      new data_reduction_proxy::DataStore());
+  base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
+  scoped_refptr<base::SequencedTaskRunner> db_task_runner =
+      pool->GetSequencedTaskRunnerWithShutdownBehavior(
+          pool->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
   data_reduction_proxy_service_.reset(
       new data_reduction_proxy::DataReductionProxyService(
           scoped_ptr<
               data_reduction_proxy::DataReductionProxyCompressionStats>(),
           data_reduction_proxy_settings_.get(), nullptr,
-          GetAwURLRequestContext(),
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)));
+          GetAwURLRequestContext(), store.Pass(),
+          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
+          db_task_runner));
   data_reduction_proxy_io_data_->SetDataReductionProxyService(
       data_reduction_proxy_service_->GetWeakPtr());
 
   visitedlink_master_.reset(
       new visitedlink::VisitedLinkMaster(this, this, false));
   visitedlink_master_->Init();
 
   form_database_service_.reset(
       new AwFormDatabaseService(context_storage_path_));
 }
@@ skipping 189 matching lines @@
   DCHECK(user_pref_service_.get());
   DCHECK(GetDataReductionProxySettings());
   data_reduction_proxy::DataReductionProxyService*
       data_reduction_proxy_service =
           GetDataReductionProxySettings()->data_reduction_proxy_service();
   DCHECK(data_reduction_proxy_service);
   if (data_reduction_proxy_service->compression_stats())
     return;
   // We don't care about commit_delay for now. It is just a dummy value.
   base::TimeDelta commit_delay = base::TimeDelta::FromMinutes(60);
+  base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
+  scoped_refptr<base::SequencedTaskRunner> db_task_runner =
+      pool->GetSequencedTaskRunnerWithShutdownBehavior(
+          pool->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);

[jeremyim, 2015/07/14 23:06:03]

This shouldn't be necessary, as drp_service_ already has the db_task_runner.

[Not at Google. Contact bengr, 2015/07/15 00:08:17]

Done.

   data_reduction_proxy_service->EnableCompressionStatisticsLogging(
       user_pref_service_.get(),
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI),
-      commit_delay);
+      db_task_runner, commit_delay);
 }
 
 }  // namespace android_webview