Remove support for branch hints from the IA32 and X64 assembler.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
===================================================================
--- src/ia32/lithium-codegen-ia32.cc	(revision 7864)
+++ src/ia32/lithium-codegen-ia32.cc	(working copy)
@@ -572,7 +572,7 @@
       __ jmp(entry, RelocInfo::RUNTIME_ENTRY);
       __ bind(&done);
     } else {
-      __ j(cc, entry, RelocInfo::RUNTIME_ENTRY, not_taken);
+      __ j(cc, entry, RelocInfo::RUNTIME_ENTRY);
     }
   }
 }
@@ -1482,7 +1482,7 @@
     // Don't base result on EFLAGS when a NaN is involved. Instead
     // jump to the unordered case, which produces a false value.
     __ ucomisd(ToDoubleRegister(left), ToDoubleRegister(right));
-    __ j(parity_even, &unordered, not_taken, Label::kNear);
+    __ j(parity_even, &unordered, Label::kNear);
   } else {
     EmitCmpI(left, right);
   }
@@ -2006,7 +2006,7 @@
 
   // A Smi is not an instance of anything.
   __ test(object, Immediate(kSmiTagMask));
-  __ j(zero, &false_result, not_taken);
+  __ j(zero, &false_result);
 
   // This is the inlined call site instanceof cache. The two occurences of the
   // hole value will be patched to the last map/result pair generated by the
@@ -2016,7 +2016,7 @@
   __ mov(map, FieldOperand(object, HeapObject::kMapOffset));
   __ bind(deferred->map_check());  // Label for calculating code patching.
   __ cmp(map, factory()->the_hole_value());  // Patched to cached map.
-  __ j(not_equal, &cache_miss, not_taken, Label::kNear);
+  __ j(not_equal, &cache_miss, Label::kNear);
   __ mov(eax, factory()->the_hole_value());  // Patched to either true or false.
   __ jmp(&done);
 
@@ -3597,7 +3597,7 @@
 
   // Smi check.
   __ test(input_reg, Immediate(kSmiTagMask));
-  __ j(zero, &load_smi, not_taken, Label::kNear);
+  __ j(zero, &load_smi, Label::kNear);
 
   // Heap number map check.
   __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset),