Decouple input_method from BrowserThread (and content/).

chrome/browser/chromeos/input_method/input_method_delegate_impl.cc

Index: chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc b/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
index a69cdc4d0e3e1a678d5a7264bba3939c83f3f518..04512777b9f5e5191accb642c0aff14b538d1c88 100644
--- a/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
+++ b/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
@@ -5,9 +5,11 @@
 #include "chrome/browser/chromeos/input_method/input_method_delegate_impl.h"
 
 #include "base/logging.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
+#include "content/public/browser/browser_thread.h"
 
 namespace chromeos {
 namespace input_method {
@@ -33,5 +35,19 @@ std::string InputMethodDelegateImpl::GetActiveLocale() const {
   return std::string();
 }
 
+scoped_refptr<base::SequencedTaskRunner>
+InputMethodDelegateImpl::GetDefaultTaskRunner() const {
+  return content::BrowserThread::GetMessageLoopProxyForThread(
+      content::BrowserThread::UI);
+}
+
+scoped_refptr<base::SequencedTaskRunner>
+InputMethodDelegateImpl::GetWorkerTaskRunner() const {
+  scoped_refptr<base::SequencedWorkerPool> worker_pool(
+      content::BrowserThread::GetBlockingPool());
+
+  return worker_pool->GetSequencedTaskRunner(worker_pool->GetSequenceToken());
+}
+
 }  // namespace input_method
 }  // namespace chromeos