localStorage: Aggressively flush to disk for Android WebView.

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/pending_task.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_device_source.h"
 #include "base/process/process_metrics.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/timer/hi_res_timer_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
+#include "content/browser/dom_storage/dom_storage_area.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/gamepad/gamepad_service.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 #include "content/browser/histogram_synchronizer.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/media/media_internals.h"
@@ skipping 530 matching lines @@
     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
   }
 #endif
 
   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
     memory_observer_.reset(new MemoryObserver());
     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
   }
 
+  if (parsed_command_line_.HasSwitch(
+          switches::kEnableAggressiveDOMStorageFlushing)) {
+    TRACE_EVENT0("startup",
+                 "BrowserMainLoop::Subsystem:EnableAggressiveCommitDelay");
+    DOMStorageArea::EnableAggressiveCommitDelay();
+  }
+
 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
   trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
       base::MessageLoop::current()->message_loop_proxy(),
       ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
       ::GetHeapProfile));
 #endif
 }
 
 int BrowserMainLoop::PreCreateThreads() {
   if (parts_) {
@@ skipping 691 matching lines @@
 
 void BrowserMainLoop::EndStartupTracing() {
   is_tracing_startup_ = false;
   TracingController::GetInstance()->DisableRecording(
       TracingController::CreateFileSink(
           startup_trace_file_,
           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
 }
 
 }  // namespace content