libbinder: remove obsolete getBlobAshmemSize

This used to be referenced by some prebuilts,
but should be able to remove now.

Bug: N/A
Test: N/A
Change-Id: I77306c123bf3535d7a0cb7857e1e1d99d3c1c7d4

Author: Steven Moreland

libs/binder/Parcel.cpp

@@ -3287,14 +3287,6 @@ void Parcel::scanForFds() const {
 }
 
 #ifdef BINDER_WITH_KERNEL_IPC
-size_t Parcel::getBlobAshmemSize() const
-{
-    // This used to return the size of all blobs that were written to ashmem, now we're returning
-    // the ashmem currently referenced by this Parcel, which should be equivalent.
-    // TODO(b/202029388): Remove method once ABI can be changed.
-    return getOpenAshmemSize();
-}
-
 size_t Parcel::getOpenAshmemSize() const
 {
     auto* kernelFields = maybeKernelFields();

libs/binder/include/binder/Parcel.h

@@ -1479,14 +1479,15 @@ class Parcel {
      * Note: for historical reasons, this does not include ashmem memory which
      * is referenced by this Parcel, but which this parcel doesn't own (e.g.
      * writeFileDescriptor is called without 'takeOwnership' true).
+     *
+     * WARNING: you should not use this, but rather, unparcel, and inspect
+     * each FD independently. This counts ashmem size, but there may be
+     * other resources used for non-ashmem FDs, such as other types of
+     * shared memory, files, etc..
      */
     LIBBINDER_EXPORTED size_t getOpenAshmemSize() const;
 
 private:
-    // TODO(b/202029388): Remove 'getBlobAshmemSize' once no prebuilts reference
-    // this
-    LIBBINDER_EXPORTED size_t getBlobAshmemSize() const;
-
     // Needed so that we can save object metadata to the disk
     friend class android::binder::debug::RecordedTransaction;
 };