Initial switch to Chromium-style CHECK_* and DCHECK_* macros.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 3a477fc7937382ceae2ba1951f918683cb779c0e..2071038b0fb40b97d5a1cf2dc0e2c19ff0fe8ced 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -1640,7 +1640,7 @@ void MacroAssembler::SmiAdd(Register dst,
                             Register src2,
                             Label* on_not_smi_result,
                             Label::Distance near_jump) {
-  DCHECK_NOT_NULL(on_not_smi_result);
+  DCHECK(on_not_smi_result);
   DCHECK(!dst.is(src2));
   SmiAddHelper<Register>(this, dst, src1, src2, on_not_smi_result, near_jump);
 }
@@ -1651,7 +1651,7 @@ void MacroAssembler::SmiAdd(Register dst,
                             const Operand& src2,
                             Label* on_not_smi_result,
                             Label::Distance near_jump) {
-  DCHECK_NOT_NULL(on_not_smi_result);
+  DCHECK(on_not_smi_result);
   DCHECK(!src2.AddressUsesRegister(dst));
   SmiAddHelper<Operand>(this, dst, src1, src2, on_not_smi_result, near_jump);
 }
@@ -1704,7 +1704,7 @@ void MacroAssembler::SmiSub(Register dst,
                             Register src2,
                             Label* on_not_smi_result,
                             Label::Distance near_jump) {
-  DCHECK_NOT_NULL(on_not_smi_result);
+  DCHECK(on_not_smi_result);
   DCHECK(!dst.is(src2));
   SmiSubHelper<Register>(this, dst, src1, src2, on_not_smi_result, near_jump);
 }
@@ -1715,7 +1715,7 @@ void MacroAssembler::SmiSub(Register dst,
                             const Operand& src2,
                             Label* on_not_smi_result,
                             Label::Distance near_jump) {
-  DCHECK_NOT_NULL(on_not_smi_result);
+  DCHECK(on_not_smi_result);
   DCHECK(!src2.AddressUsesRegister(dst));
   SmiSubHelper<Operand>(this, dst, src1, src2, on_not_smi_result, near_jump);
 }
@@ -2198,7 +2198,7 @@ void MacroAssembler::SelectNonSmi(Register dst,
   Check(not_both_smis, kBothRegistersWereSmisInSelectNonSmi);
 #endif
   STATIC_ASSERT(kSmiTag == 0);
-  DCHECK_EQ(0, Smi::FromInt(0));
+  DCHECK_EQ(static_cast<Smi*>(0), Smi::FromInt(0));
   movl(kScratchRegister, Immediate(kSmiTagMask));
   andp(kScratchRegister, src1);
   testl(kScratchRegister, src2);