validation: Move PruneOneBlockFile to BlockManager

[META] This is a pure refactor commit.

Move PruneBlockFile to BlockManager because:
1. PruneOneBlockFile only acts on BlockManager
2. Eliminates the need for callers (FindFilesToPrune{,Manual}) to have a
   reference to the larger ChainstateManager, just a reference to
   BlockManager is enough. See following commits.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/validation.cpp b/src/validation.cpp
index 7478fb5510..76f8bcba7f 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -3912,12 +3912,12 @@ uint64_t CalculateCurrentUsage()
     return retval;
 }
 
-void ChainstateManager::PruneOneBlockFile(const int fileNumber)
+void BlockManager::PruneOneBlockFile(const int fileNumber)
 {
     AssertLockHeld(cs_main);
     LOCK(cs_LastBlockFile);
 
-    for (const auto& entry : m_blockman.m_block_index) {
+    for (const auto& entry : m_block_index) {
         CBlockIndex* pindex = entry.second;
         if (pindex->nFile == fileNumber) {
             pindex->nStatus &= ~BLOCK_HAVE_DATA;
@@ -3931,12 +3931,12 @@ void ChainstateManager::PruneOneBlockFile(const int fileNumber)
             // to be downloaded again in order to consider its chain, at which
             // point it would be considered as a candidate for
             // m_blocks_unlinked or setBlockIndexCandidates.
-            auto range = m_blockman.m_blocks_unlinked.equal_range(pindex->pprev);
+            auto range = m_blocks_unlinked.equal_range(pindex->pprev);
             while (range.first != range.second) {
                 std::multimap<CBlockIndex *, CBlockIndex *>::iterator _it = range.first;
                 range.first++;
                 if (_it->second == pindex) {
-                    m_blockman.m_blocks_unlinked.erase(_it);
+                    m_blocks_unlinked.erase(_it);
                 }
             }
         }
@@ -3972,7 +3972,7 @@ static void FindFilesToPruneManual(ChainstateManager& chainman, std::set<int>& s
     for (int fileNumber = 0; fileNumber < nLastBlockFile; fileNumber++) {
         if (vinfoBlockFile[fileNumber].nSize == 0 || vinfoBlockFile[fileNumber].nHeightLast > nLastBlockWeCanPrune)
             continue;
-        chainman.PruneOneBlockFile(fileNumber);
+        chainman.m_blockman.PruneOneBlockFile(fileNumber);
         setFilesToPrune.insert(fileNumber);
         count++;
     }
@@ -4047,7 +4047,7 @@ static void FindFilesToPrune(ChainstateManager& chainman, std::set<int>& setFile
             if (vinfoBlockFile[fileNumber].nHeightLast > nLastBlockWeCanPrune)
                 continue;
 
-            chainman.PruneOneBlockFile(fileNumber);
+            chainman.m_blockman.PruneOneBlockFile(fileNumber);
             // Queue up the files for removal
             setFilesToPrune.insert(fileNumber);
             nCurrentUsage -= nBytesToPrune;