Revert of Remove CPDF_Object::Release() in favor of direct delete (patchset #11 id:200001 of https://codereview.chromium.org/2384883003/ )

Reason for revert:
Looks like it's blocking the roll.

https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_compile_dbg_ng/builds/186619

Original issue's description:
> Remove CPDF_Object::Release() in favor of direct delete
>
> Follow-on once we prove Release always deletes in previous CL.
>
> Committed: https://pdfium.googlesource.com/pdfium/+/4de3d095c9d9e961f93750cf1ebd489fd515be12

TBR=thestig@chromium.org,tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2478253002

3 files changed, 15 insertions, 7 deletions

diff --git a/core/fpdfdoc/cpdf_annot.cpp b/core/fpdfdoc/cpdf_annot.cpp
index 2f3fc804f3..80edde8a8f 100644
--- a/core/fpdfdoc/cpdf_annot.cpp
+++ b/core/fpdfdoc/cpdf_annot.cpp
@@ -57,7 +57,7 @@ CPDF_Annot::CPDF_Annot(CPDF_Dictionary* pDict,
 
 CPDF_Annot::~CPDF_Annot() {
   if (m_bOwnedAnnotDict)
-    delete m_pAnnotDict;
+    m_pAnnotDict->Release();
   ClearCachedAP();
 }
 
diff --git a/core/fpdfdoc/cpdf_filespec_unittest.cpp b/core/fpdfdoc/cpdf_filespec_unittest.cpp
index 01989ee0bd..72b073510b 100644
--- a/core/fpdfdoc/cpdf_filespec_unittest.cpp
+++ b/core/fpdfdoc/cpdf_filespec_unittest.cpp
@@ -12,6 +12,13 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/test_support.h"
 
+namespace {
+
+using ScopedObj = std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>>;
+using ScopedDict =
+    std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>>;
+}
+
 TEST(cpdf_filespec, EncodeDecodeFileName) {
   std::vector<pdfium::NullTermWstrFuncTestData> test_data = {
     // Empty src string.
@@ -67,7 +74,7 @@ TEST(cpdf_filespec, GetFileName) {
       L"/docs/test.pdf"
 #endif
     };
-    std::unique_ptr<CPDF_Object> str_obj(new CPDF_String(test_data.input));
+    ScopedObj str_obj(new CPDF_String(test_data.input));
     CPDF_FileSpec file_spec(str_obj.get());
     CFX_WideString file_name;
     EXPECT_TRUE(file_spec.GetFileName(&file_name));
@@ -98,7 +105,7 @@ TEST(cpdf_filespec, GetFileName) {
     };
     // Keyword fields in reverse order of precedence to retrieve the file name.
     const char* const keywords[5] = {"Unix", "Mac", "DOS", "F", "UF"};
-    std::unique_ptr<CPDF_Dictionary> dict_obj(new CPDF_Dictionary());
+    ScopedDict dict_obj(new CPDF_Dictionary());
     CPDF_FileSpec file_spec(dict_obj.get());
     CFX_WideString file_name;
     for (int i = 0; i < 5; ++i) {
@@ -115,7 +122,7 @@ TEST(cpdf_filespec, GetFileName) {
   }
   {
     // Invalid object.
-    std::unique_ptr<CPDF_Object> name_obj(new CPDF_Name("test.pdf"));
+    ScopedObj name_obj(new CPDF_Name("test.pdf"));
     CPDF_FileSpec file_spec(name_obj.get());
     CFX_WideString file_name;
     EXPECT_FALSE(file_spec.GetFileName(&file_name));
@@ -136,7 +143,7 @@ TEST(cpdf_filespec, SetFileName) {
 #endif
   };
   // String object.
-  std::unique_ptr<CPDF_Object> str_obj(new CPDF_String(L"babababa"));
+  ScopedObj str_obj(new CPDF_String(L"babababa"));
   CPDF_FileSpec file_spec1(str_obj.get());
   file_spec1.SetFileName(test_data.input);
   // Check internal object value.
@@ -148,7 +155,7 @@ TEST(cpdf_filespec, SetFileName) {
   EXPECT_TRUE(file_name == test_data.input);
 
   // Dictionary object.
-  std::unique_ptr<CPDF_Dictionary> dict_obj(new CPDF_Dictionary());
+  ScopedDict dict_obj(new CPDF_Dictionary());
   CPDF_FileSpec file_spec2(dict_obj.get());
   file_spec2.SetFileName(test_data.input);
   // Check internal object value.
diff --git a/core/fpdfdoc/cpdf_formfield.cpp b/core/fpdfdoc/cpdf_formfield.cpp
index e2240c9f2f..e82ef7800e 100644
--- a/core/fpdfdoc/cpdf_formfield.cpp
+++ b/core/fpdfdoc/cpdf_formfield.cpp
@@ -575,7 +575,8 @@ bool CPDF_FormField::SetItemSelection(int index, bool bSelected, bool bNotify) {
           if (pValue->GetUnicodeText() == opt_value)
             m_pDict->RemoveFor("V");
         } else if (pValue->IsArray()) {
-          std::unique_ptr<CPDF_Array> pArray(new CPDF_Array);
+          std::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Array>> pArray(
+              new CPDF_Array);
           for (int i = 0; i < CountOptions(); i++) {
             if (i != index && IsItemSelected(i)) {
               opt_value = GetOptionValue(i);