Revert of [BlobStorage] Implementing disk.

storage/common/blob_storage/blob_storage_constants.h

Index: storage/common/blob_storage/blob_storage_constants.h
diff --git a/storage/common/blob_storage/blob_storage_constants.h b/storage/common/blob_storage/blob_storage_constants.h
index b94e886f3de7bc9685442035789a2833dac6ed64..f54d20aaa701aab134152616d7699c1aea04dd93 100644
--- a/storage/common/blob_storage/blob_storage_constants.h
+++ b/storage/common/blob_storage/blob_storage_constants.h
@@ -28,8 +28,8 @@
   size_t max_blob_in_memory_space = 500 * 1024 * 1024;
 
   // This is the maximum amount of disk space we can use.
-  // TODO(dmurph): Determine initial heuristic based on disk usage & arch.
-  uint64_t max_blob_disk_space = 0ull;
+  // TODO(dmurph): Consider storage size of the device.
+  uint64_t max_blob_disk_space = 5ull * 1024 * 1024 * 1024;
 
   // This is the minimum file size we can use when paging blob items to disk.
   // We combine items until we reach at least this size.
@@ -73,13 +73,12 @@
   // Blob state section:
   // The blob has finished.
   DONE = 200,
-  // Waiting for memory or file quota for the to-be transported data.
+  // The system is pending on quota being granted, the transport layer
+  // populating pending data, and/or copying data from dependent blobs. See
+  // BlobEntry::BuildingState determine which of these are happening, as they
+  // all can happen concurrently.
   PENDING_QUOTA = 201,
-  // Waiting for data to be transported (quota has been granted).
   PENDING_TRANSPORT = 202,
-  // Waiting for any operations involving dependent blobs after transport data
-  // has been populated. See BlobEntry::BuildingState for more info.
-  // TODO(dmurph): Change to PENDING_REFERENCED_BLOBS (crbug.com/670398).
   PENDING_INTERNALS = 203,
   LAST = PENDING_INTERNALS
 };