Add SetFileSize() IPC for WebSQL.

content/browser/renderer_host/database_message_filter.cc

Index: content/browser/renderer_host/database_message_filter.cc
diff --git a/content/browser/renderer_host/database_message_filter.cc b/content/browser/renderer_host/database_message_filter.cc
index bb5bdd6946eafc25ebaa61b644661dd4d4d7990f..7a5de8a109170f2b01ceb5af9caa12d698b852cb 100644
--- a/content/browser/renderer_host/database_message_filter.cc
+++ b/content/browser/renderer_host/database_message_filter.cc
@@ -99,6 +99,8 @@ bool DatabaseMessageFilter::OnMessageReceived(const IPC::Message& message) {
                                     OnDatabaseGetFileSize)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_GetSpaceAvailable,
                                     OnDatabaseGetSpaceAvailable)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(DatabaseHostMsg_SetFileSize,
+                                    OnDatabaseSetFileSize)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Opened, OnDatabaseOpened)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Modified, OnDatabaseModified)
     IPC_MESSAGE_HANDLER(DatabaseHostMsg_Closed, OnDatabaseClosed)
@@ -288,6 +290,19 @@ void DatabaseMessageFilter::OnDatabaseGetUsageAndQuota(
   Send(reply_msg);
 }
 
+void DatabaseMessageFilter::OnDatabaseSetFileSize(
+    const base::string16& vfs_file_name, int64 size, IPC::Message* reply_msg) {
+  DCHECK_CURRENTLY_ON(BrowserThread::FILE);
+  bool success = false;
+  base::FilePath db_file =
+      DatabaseUtil::GetFullFilePathForVfsFile(db_tracker_.get(), vfs_file_name);
+  if (!db_file.empty())
+    success = VfsBackend::SetFileSize(db_file, size);
+
+  DatabaseHostMsg_SetFileSize::WriteReplyParams(reply_msg, success);
+  Send(reply_msg);

[jam, 2015/04/03 15:14:23]

this method, and a few others in this class, are using
IPC_MESSAGE_HANDLER_DELAY_REPLY but don't need to.
IPC_MESSAGE_HANDLER_DELAY_REPLY should only be used when the reply is written to
asynchronously. 

[Scott Hess - ex-Googler, 2015/04/03 17:16:36]

Apologies, I was just copy/pasting from the parallel method.  Changed OpenFile,
GetFileAttributes, GetFileSize and SetFileSize to not be _DELAY_REPLY.

+}
+
 void DatabaseMessageFilter::OnDatabaseOpened(
     const std::string& origin_identifier,
     const base::string16& database_name,