PartitionAlloc: Remove memory_reclaimer.h dependency from partition_alloc.h

This CL reduces the estimated pre-processed size of partition_alloc.h
by 160KB.

This CL has no behavior changes. This CL affects 8,400+ compilation
units.

Bug: 242216
Change-Id: I7cfa2a79f8ed7604fcd71fef2ec21cfa11b295a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2297026
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788394}

base/allocator/partition_allocator/partition_alloc.cc

@@ -8,6 +8,7 @@
 
 #include <memory>
 
+#include "base/allocator/partition_allocator/memory_reclaimer.h"
 #include "base/allocator/partition_allocator/oom.h"
 #include "base/allocator/partition_allocator/page_allocator_internal.h"
 #include "base/allocator/partition_allocator/partition_alloc_features.h"
@@ -808,4 +809,32 @@ void PartitionRoot<thread_safe>::DumpStats(const char* partition_name,
 template struct BASE_EXPORT PartitionRoot<internal::ThreadSafe>;
 template struct BASE_EXPORT PartitionRoot<internal::NotThreadSafe>;
 
+namespace internal {
+
+template <bool thread_safe>
+PartitionAllocator<thread_safe>::~PartitionAllocator() {
+  PartitionAllocMemoryReclaimer::Instance()->UnregisterPartition(
+      &partition_root_);
+}
+
+template <bool thread_safe>
+void PartitionAllocator<thread_safe>::init(
+    PartitionAllocatorAlignment alignment) {
+  partition_root_.Init(
+      alignment ==
+      PartitionAllocatorAlignment::kAlignedAlloc /* enforce_alignment */);
+  PartitionAllocMemoryReclaimer::Instance()->RegisterPartition(
+      &partition_root_);
+}
+
+template void PartitionAllocator<internal::ThreadSafe>::~PartitionAllocator();
+template void PartitionAllocator<internal::ThreadSafe>::init(
+    PartitionAllocatorAlignment alignment);
+template void
+    PartitionAllocator<internal::NotThreadSafe>::~PartitionAllocator();
+template void PartitionAllocator<internal::NotThreadSafe>::init(
+    PartitionAllocatorAlignment alignment);
+
+}  // namespace internal
+
 }  // namespace base

base/allocator/partition_allocator/partition_alloc.h

@@ -56,7 +56,6 @@
 
 #include <atomic>
 
-#include "base/allocator/partition_allocator/memory_reclaimer.h"
 #include "base/allocator/partition_allocator/page_allocator.h"
 #include "base/allocator/partition_allocator/partition_address_space.h"
 #include "base/allocator/partition_allocator/partition_alloc_check.h"
@@ -920,19 +919,10 @@ namespace internal {
 template <bool thread_safe>
 struct BASE_EXPORT PartitionAllocator {
   PartitionAllocator() = default;
-  ~PartitionAllocator() {
-    PartitionAllocMemoryReclaimer::Instance()->UnregisterPartition(
-        &partition_root_);
-  }
+  ~PartitionAllocator();
 
   void init(PartitionAllocatorAlignment alignment =
-                PartitionAllocatorAlignment::kRegular) {
-    partition_root_.Init(
-        alignment ==
-        PartitionAllocatorAlignment::kAlignedAlloc /* enforce_alignment */);
-    PartitionAllocMemoryReclaimer::Instance()->RegisterPartition(
-        &partition_root_);
-  }
+                PartitionAllocatorAlignment::kRegular);
   ALWAYS_INLINE PartitionRoot<thread_safe>* root() { return &partition_root_; }
 
  private:

base/allocator/partition_allocator/partition_alloc_perftest.cc

@@ -7,6 +7,8 @@
 
 #include "base/allocator/partition_allocator/partition_alloc.h"
 #include "base/allocator/partition_allocator/partition_alloc_check.h"
+#include "base/bind.h"
+#include "base/callback.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"