Cleanups: addressed your comments from https://codereview.chromium.org/14962008/

runtime/vm/bigint_operations_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/unit_test.h"
 
@@ skipping 61 matching lines @@
   big = BigintOperations::NewFromInt64(kValue64);
   big_test = BigintOperations::Multiply(big_test, big_test);
   EXPECT_EQ(0, BigintOperations::Compare(big, big_test));
   big = BigintOperations::NewFromInt64(-kValue64);
   big_test = BigintOperations::Subtract(
       Bigint::Handle(BigintOperations::NewFromInt64(0)), big_test);
   EXPECT_EQ(0, BigintOperations::Compare(big, big_test));
 
   const Bigint& one = Bigint::Handle(BigintOperations::NewFromInt64(1));
   big = BigintOperations::NewFromInt64(kMinInt64);
-  EXPECT(BigintOperations::FitsIntoMint(big));
-  int64_t back = BigintOperations::ToMint(big);
+  EXPECT(BigintOperations::FitsIntoInt64(big));
+  int64_t back = BigintOperations::ToInt64(big);
   EXPECT_EQ(kMinInt64, back);
 
   big = BigintOperations::Subtract(big, one);
-  EXPECT(!BigintOperations::FitsIntoMint(big));
+  EXPECT(!BigintOperations::FitsIntoInt64(big));
 
   big = BigintOperations::NewFromInt64(kMaxInt64);
-  EXPECT(BigintOperations::FitsIntoMint(big));
-  back = BigintOperations::ToMint(big);
+  EXPECT(BigintOperations::FitsIntoInt64(big));
+  back = BigintOperations::ToInt64(big);
   EXPECT_EQ(kMaxInt64, back);
 
   big = BigintOperations::Add(big, one);
-  EXPECT(!BigintOperations::FitsIntoMint(big));
+  EXPECT(!BigintOperations::FitsIntoInt64(big));
 }
 
 
 TEST_CASE(BigintUint64) {
   const Bigint& one = Bigint::Handle(BigintOperations::NewFromUint64(1));
-  EXPECT(BigintOperations::FitsIntoMint(one));
+  EXPECT(BigintOperations::FitsIntoInt64(one));
   EXPECT(BigintOperations::FitsIntoUint64(one));
 
   Bigint& big = Bigint::Handle(BigintOperations::NewFromUint64(kMaxUint64));
-  EXPECT(!BigintOperations::FitsIntoMint(big));
+  EXPECT(!BigintOperations::FitsIntoInt64(big));
   EXPECT(BigintOperations::FitsIntoUint64(big));
 
   uint64_t back = BigintOperations::ToUint64(big);
   EXPECT_EQ(kMaxUint64, back);
 
   big = BigintOperations::Add(big, one);
-  EXPECT(!BigintOperations::FitsIntoMint(big));
+  EXPECT(!BigintOperations::FitsIntoInt64(big));
   EXPECT(!BigintOperations::FitsIntoUint64(big));
 
   big = BigintOperations::Subtract(big, one);
-  EXPECT(!BigintOperations::FitsIntoMint(big));
+  EXPECT(!BigintOperations::FitsIntoInt64(big));
   EXPECT(BigintOperations::FitsIntoUint64(big));
 
   big = BigintOperations::ShiftRight(big, 1);
-  EXPECT(BigintOperations::FitsIntoMint(big));
+  EXPECT(BigintOperations::FitsIntoInt64(big));
   EXPECT(BigintOperations::FitsIntoUint64(big));
 }
 
 
 TEST_CASE(BigintDouble) {
   Smi& smi = Smi::Handle(Smi::New(5));
   Bigint& bigint = Bigint::Handle(BigintOperations::NewFromSmi(smi));
   Double& dbl = Double::Handle(BigintOperations::ToDouble(bigint));
   EXPECT_EQ(5.0, dbl.value());
 
@@ skipping 2094 matching lines @@
       "123456789012345678901234567890123456789012345678901234567890123456789012"
       "345678901234567890123456789012345678901234567890123456789012345678901234"
       "567890123456789012345678901234567890123456789012345678901234567890123456"
       "789012345678901234567890123456789012345678901234567890123456789012345678"
       "90123456789012345678901234567890",
       "0x1234567890ABCDEF01234567890ABCDEF01234567890ABCDEF01234567890ABCDEF"
       "01234567890ABCDEE");
 }
 
 }  // namespace dart