Fix checked_ptr unit test by supplying missing PartitionOptions param

This broke some of the checked_ptr unit tests by removing the default parameter for PartitionOptions.
https://chromium-review.googlesource.com/c/chromium/src/+/2507432
This CL adds the PartitionOptions param

Change-Id: I5690fef518835d9379c8fd28e8dcced8d820c8f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2507420Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Keishi Hattori <keishi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822869}

base/memory/checked_ptr_unittest.cc

@@ -830,7 +830,7 @@ TEST(CheckedPtr2OrMTEImpl, CrashOnUseAfterFree) {
   // new/delete once PartitionAlloc Everywhere is fully enabled.
   PartitionAllocGlobalInit(HandleOOM);
   PartitionAllocator<ThreadSafe> allocator;
-  allocator.init();
+  allocator.init({});
   void* raw_ptr = allocator.root()->Alloc(sizeof(int), "int");
   // Use the actual CheckedPtr implementation, not a test substitute, to
   // exercise real PartitionAlloc paths.
@@ -851,7 +851,7 @@ TEST(CheckedPtr2OrMTEImpl, CrashOnUseAfterFree_WithOffset) {
   // new/delete once PartitionAlloc Everywhere is fully enabled.
   PartitionAllocGlobalInit(HandleOOM);
   PartitionAllocator<ThreadSafe> allocator;
-  allocator.init();
+  allocator.init({});
   const uint8_t kSize = 100;
   void* raw_ptr = allocator.root()->Alloc(kSize * sizeof(uint8_t), "uint8_t");
   // Use the actual CheckedPtr implementation, not a test substitute, to
@@ -884,7 +884,7 @@ TEST(BackupRefPtrImpl, Basic) {
   // new/delete once PartitionAlloc Everywhere is fully enabled.
   PartitionAllocGlobalInit(HandleOOM);
   PartitionAllocator<ThreadSafe> allocator;
-  allocator.init();
+  allocator.init({});
   uint64_t* raw_ptr1 = reinterpret_cast<uint64_t*>(
       allocator.root()->Alloc(sizeof(uint64_t), ""));
   // Use the actual CheckedPtr implementation, not a test substitute, to