Remove drive::FileSystemInterface::Initialize().

chrome/browser/chromeos/drive/fake_file_system.cc

Index: chrome/browser/chromeos/drive/fake_file_system.cc
diff --git a/chrome/browser/chromeos/drive/fake_file_system.cc b/chrome/browser/chromeos/drive/fake_file_system.cc
index 415e87dc381acf3b01dfd3007a5f0e57ed544100..427c669e6a88b14f7bdd8f15b8f4710ff8fc2b3c 100644
--- a/chrome/browser/chromeos/drive/fake_file_system.cc
+++ b/chrome/browser/chromeos/drive/fake_file_system.cc
@@ -18,6 +18,7 @@
 #include "chrome/browser/google_apis/drive_api_parser.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
 #include "content/public/browser/browser_thread.h"
+#include "testing/gtest/include/gtest/gtest.h"
 
 namespace drive {
 namespace test_util {
@@ -27,21 +28,12 @@ using content::BrowserThread;
 FakeFileSystem::FakeFileSystem(DriveServiceInterface* drive_service)
     : drive_service_(drive_service),
       weak_ptr_factory_(this) {
+  CHECK(cache_dir_.CreateUniqueTempDir());
 }
 
 FakeFileSystem::~FakeFileSystem() {
 }
 
-bool FakeFileSystem::InitializeForTesting() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  return cache_dir_.CreateUniqueTempDir();
-}
-
-void FakeFileSystem::Initialize() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  InitializeForTesting();
-}
-
 void FakeFileSystem::AddObserver(FileSystemObserver* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }