Move c/c/e/extension_set to top-level extensions/

chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc
index f07033c18d1c25bdf4265bc85435abdad7778538..18169d2731aeb7da49ed4617087427f7f9855501 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine_unittest.cc
@@ -53,11 +53,11 @@ class MockExtensionService : public TestExtensionService {
   MockExtensionService() {}
   virtual ~MockExtensionService() {}
 
-  virtual const ExtensionSet* extensions() const OVERRIDE {
+  virtual const extensions::ExtensionSet* extensions() const OVERRIDE {
     return &extensions_;
   }
 
-  virtual const ExtensionSet* disabled_extensions() const OVERRIDE {
+  virtual const extensions::ExtensionSet* disabled_extensions() const OVERRIDE {
     return &disabled_extensions_;
   }
 
@@ -89,8 +89,8 @@ class MockExtensionService : public TestExtensionService {
   }
 
  private:
-  ExtensionSet extensions_;
-  ExtensionSet disabled_extensions_;
+  extensions::ExtensionSet extensions_;
+  extensions::ExtensionSet disabled_extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(MockExtensionService);
 };