Reduce the in-memory blob storgae limit on Android

storage/common/blob_storage/blob_storage_constants.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_
 #define STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/callback_forward.h"
+#include "build/build_config.h"
 #include "storage/common/storage_common_export.h"
 
 namespace storage {
 
 constexpr size_t kDefaultIPCMemorySize = 250u * 1024;
 constexpr size_t kDefaultSharedMemorySize = 10u * 1024 * 1024;
 constexpr size_t kDefaultMaxBlobInMemorySpace = 500u * 1024 * 1024;
 constexpr uint64_t kDefaultMaxBlobDiskSpace = 0ull;
+constexpr uint64_t kDefaultMaxPageFileSize = 100ull * 1024 * 1024;
+
+#if defined(OS_ANDROID)
+// On minimal Android maximum in-memory space can be as low as 5MB.
+constexpr uint64_t kDefaultMinPageFileSize = 5ull * 1024 * 1024 / 2;
+#else
 constexpr uint64_t kDefaultMinPageFileSize = 5ull * 1024 * 1024;
-constexpr uint64_t kDefaultMaxPageFileSize = 100ull * 1024 * 1024;
+#endif
 
 // All sizes are in bytes.
 struct STORAGE_COMMON_EXPORT BlobStorageLimits {
   // Returns if the current configuration is valid.
   bool IsValid() const;
 
   size_t memory_limit_before_paging() const {
     return max_blob_in_memory_space - min_page_file_size;
   }
 
@@ skipping 79 matching lines @@
 
 STORAGE_COMMON_EXPORT bool BlobStatusIsPending(BlobStatus status);
 
 // Returns if the status is a bad enough error to flag the IPC as bad. This is
 // only INVALID_CONSTRUCTION_ARGUMENTS.
 STORAGE_COMMON_EXPORT bool BlobStatusIsBadIPC(BlobStatus status);
 
 }  // namespace storage
 
 #endif  // STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_