IndexedDB: Make getAll() requests fail if result exceeds IPC limits

content/common/indexed_db/indexed_db_constants.h

Index: content/common/indexed_db/indexed_db_constants.h
diff --git a/content/common/indexed_db/indexed_db_constants.h b/content/common/indexed_db/indexed_db_constants.h
index b6c6363cdc35942859b6b70ac81606d975546604..4cb4c7e120e262b3d2ef5dcedc2d692e65289260 100644
--- a/content/common/indexed_db/indexed_db_constants.h
+++ b/content/common/indexed_db/indexed_db_constants.h
@@ -5,12 +5,17 @@
 #ifndef CONTENT_COMMON_INDEXED_DB_INDEXED_DB_CONSTANTS_H_
 #define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_CONSTANTS_H_
 
+#include "ipc/ipc_channel.h"
+
 namespace content {
 
 const int32 kNoDatabase = -1;
 
 const size_t kMaxIDBMessageOverhead = 1024 * 1024;  // 1MB; arbitrarily chosen.
 
+const size_t kMaxIDBMessageSizeInBytes =
+    IPC::Channel::kMaximumMessageSize - kMaxIDBMessageOverhead;
+
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_CONSTANTS_H_