Move IndexedDB from WEBKIT_DEPRECATED to dedicated thread

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 4e1411dd138d3f28dba2ca88e309edc18057a482..e6027ad1e4b222b24d853647f266a24b319b423c 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -589,6 +589,11 @@ void BrowserMainLoop::CreateThreads() {
 
   }
 
+#if !defined(OS_IOS)
+  indexed_db_thread_.reset(new base::Thread("IndexedDB"));
+  indexed_db_thread_->Start();
+#endif
+
   BrowserThreadsStarted();
 
   if (parts_) {
@@ -737,6 +742,10 @@ void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
     }
   }
 
+#if !defined(OS_IOS)
+  indexed_db_thread_.reset();
+#endif
+
   // Close the blocking I/O pool after the other threads. Other threads such
   // as the I/O thread may need to schedule work like closing files or flushing
   // data during shutdown, so the blocking pool needs to be available. There