Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/parser/cpdf_array_unittest.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_number.h"
 #include "core/fpdfapi/parser/cpdf_reference.h"
 
 #include <memory>
 
@@ skipping 95 matching lines @@
     static const size_t kNumOfRowElems = 5;
     int elems[kNumOfRows][kNumOfRowElems] = {
         {1, 2, 3, 4, 5}, {10, 9, 8, 7, 6}, {11, 12, 13, 14, 15}};
     ScopedArray arr(new CPDF_Array);
     // Indirect references to indirect objects.
     std::unique_ptr<CPDF_IndirectObjectHolder> obj_holder(
         new CPDF_IndirectObjectHolder());
     for (size_t i = 0; i < kNumOfRows; ++i) {
       CPDF_Array* arr_elem = new CPDF_Array;
       for (size_t j = 0; j < kNumOfRowElems; ++j) {
-        CPDF_Number* obj = new CPDF_Number(elems[i][j]);
-        // Starts object number from 1.
+        UniqueObject obj(new CPDF_Number(elems[i][j]));
+        // Object number starts from 1.
         int obj_num = i * kNumOfRowElems + j + 1;
-        obj_holder->ReplaceIndirectObjectIfHigherGeneration(obj_num, obj);
+        obj_holder->ReplaceIndirectObjectIfHigherGeneration(obj_num,
+                                                            std::move(obj));
         arr_elem->InsertAt(j, new CPDF_Reference(obj_holder.get(), obj_num));
       }
       arr->InsertAt(i, arr_elem);
     }
     ASSERT_EQ(kNumOfRows, arr->GetCount());
     // Not dereferencing reference objects means just creating new references
     // instead of new copies of direct objects.
     ScopedArray arr1(arr->Clone()->AsArray());
     EXPECT_EQ(arr->GetCount(), arr1->GetCount());
     // Dereferencing reference objects creates new copies of direct objects.
@@ skipping 41 matching lines @@
 TEST(cpdf_array, Iterator) {
   int elems[] = {-23, -11,     3,         455,   2345877,
                  0,   7895330, -12564334, 10000, -100000};
   ScopedArray arr(new CPDF_Array);
   for (size_t i = 0; i < FX_ArraySize(elems); ++i)
     arr->InsertAt(i, new CPDF_Number(elems[i]));
   size_t index = 0;
   for (const auto& it : *arr)
     EXPECT_EQ(elems[index++], it->AsNumber()->GetInteger());
 }