Merge WebKit at r59636: Update v8 to r4660.

Will build and run with current webkit.

Change-Id: I57bae621fd894da363ba84e1757ad09eb7c502b9
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index a1976ec..f9b444b 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -50,6 +50,11 @@
 }
 
 
+void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) {
+  movq(Operand(kRootRegister, index << kPointerSizeLog2), source);
+}
+
+
 void MacroAssembler::PushRoot(Heap::RootListIndex index) {
   push(Operand(kRootRegister, index << kPointerSizeLog2));
 }
@@ -1227,8 +1232,7 @@
 
 void MacroAssembler::SmiShiftLeftConstant(Register dst,
                                           Register src,
-                                          int shift_value,
-                                          Label* on_not_smi_result) {
+                                          int shift_value) {
   if (!dst.is(src)) {
     movq(dst, src);
   }
@@ -1240,8 +1244,7 @@
 
 void MacroAssembler::SmiShiftLeft(Register dst,
                                   Register src1,
-                                  Register src2,
-                                  Label* on_not_smi_result) {
+                                  Register src2) {
   ASSERT(!dst.is(rcx));
   Label result_ok;
   // Untag shift amount.