localStorage: Aggressively flush to disk for Android WebView.

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 17c6ebedb1ff5c38473b8ce8f60fdef1305d5d12..e2cc7fd5c04e89a3f8672531cfe3277b1d365a63 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -25,6 +25,7 @@
 #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"
@@ -583,6 +584,11 @@ void BrowserMainLoop::MainMessageLoopStart() {
     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
   }
 
+  if (parsed_command_line_.HasSwitch(
+          switches::kEnableAggressiveDOMStorageFlushing)) {
+    DOMStorageArea::EnableAggressiveCommitDelay();

[nasko, 2015/05/08 21:19:00]

I wonder if there is a better place to initialize this later in the startup
sequence. I'll try to look around.

In the meantime, please add a TRACE_EVEN macro, so this code can be traced and
tracked in the startup sequence.

+  }
+
   base::trace_event::MemoryDumpManager::GetInstance()->Initialize();
 
   // Enable the dump providers.