Cleanup: Remove unneeded browser_thread.h includes in content/.

content/browser/indexed_db/indexed_db_database.cc

Index: content/browser/indexed_db/indexed_db_database.cc
diff --git a/content/browser/indexed_db/indexed_db_database.cc b/content/browser/indexed_db/indexed_db_database.cc
index 6e85c42dc58df8d8d3aab2180f62c440d07d5f29..cdbaca5d3c7f03917f422a8a546f1bd7badbcdcd 100644
--- a/content/browser/indexed_db/indexed_db_database.cc
+++ b/content/browser/indexed_db/indexed_db_database.cc
@@ -21,7 +21,6 @@
 #include "content/browser/indexed_db/indexed_db_transaction.h"
 #include "content/common/indexed_db/indexed_db_key_path.h"
 #include "content/common/indexed_db/indexed_db_key_range.h"
-#include "content/public/browser/browser_thread.h"
 #include "third_party/WebKit/public/platform/WebIDBDatabaseException.h"
 
 using base::ASCIIToUTF16;
@@ -700,6 +699,7 @@ struct IndexedDBDatabase::PutOperationParams {
   scoped_refptr<IndexedDBCallbacks> callbacks;
   std::vector<IndexKeys> index_keys;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(PutOperationParams);
 };
 
@@ -963,6 +963,7 @@ struct IndexedDBDatabase::OpenCursorOperationParams {
   IndexedDBDatabase::TaskType task_type;
   scoped_refptr<IndexedDBCallbacks> callbacks;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(OpenCursorOperationParams);
 };