Remove base's implicit_cast.

net/disk_cache/simple/simple_index_file_unittest.cc

Index: net/disk_cache/simple/simple_index_file_unittest.cc
diff --git a/net/disk_cache/simple/simple_index_file_unittest.cc b/net/disk_cache/simple/simple_index_file_unittest.cc
index cfff0792f9a887c560026fe4bc461c5f8eb60403..ae4945a045b3c6bf7481d3f31b34ca4ef3b94572 100644
--- a/net/disk_cache/simple/simple_index_file_unittest.cc
+++ b/net/disk_cache/simple/simple_index_file_unittest.cc
@@ -221,9 +221,8 @@ TEST_F(SimpleIndexFileTest, LoadCorruptIndex) {
   ASSERT_TRUE(simple_index_file.CreateIndexFileDirectory());
   const base::FilePath& index_path = simple_index_file.GetIndexFilePath();
   const std::string kDummyData = "nothing to be seen here";
-  EXPECT_EQ(
-      implicit_cast<int>(kDummyData.size()),
-      base::WriteFile(index_path, kDummyData.data(), kDummyData.size()));
+  EXPECT_EQ(static_cast<int>(kDummyData.size()),
+            base::WriteFile(index_path, kDummyData.data(), kDummyData.size()));
   base::Time fake_cache_mtime;
   ASSERT_TRUE(simple_util::GetMTime(simple_index_file.GetIndexFilePath(),
                                     &fake_cache_mtime));
@@ -263,9 +262,8 @@ TEST_F(SimpleIndexFileTest, SimpleCacheUpgrade) {
   const std::string index_file_contents("incorrectly serialized data");
   const base::FilePath old_index_file =
       cache_path.AppendASCII("the-real-index");
-  ASSERT_EQ(implicit_cast<int>(index_file_contents.size()),
-            base::WriteFile(old_index_file,
-                            index_file_contents.data(),
+  ASSERT_EQ(static_cast<int>(index_file_contents.size()),
+            base::WriteFile(old_index_file, index_file_contents.data(),
                             index_file_contents.size()));
 
   // Upgrade the cache.