Revert r11420 because Win32 compilation was broken.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
===================================================================
--- src/arm/lithium-arm.h	(revision 11420)
+++ src/arm/lithium-arm.h	(working copy)
@@ -132,7 +132,6 @@
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
-  V(MathFloorOfDiv)                             \
   V(ModI)                                       \
   V(MulI)                                       \
   V(NumberTagD)                                 \
@@ -580,21 +579,6 @@
 };
 
 
-class LMathFloorOfDiv: public LTemplateInstruction<1, 2, 1> {
- public:
-  LMathFloorOfDiv(LOperand* left,
-                  LOperand* right,
-                  LOperand* temp = NULL) {
-    inputs_[0] = left;
-    inputs_[1] = right;
-    temps_[0] = temp;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv, "math-floor-of-div")
-  DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
-};
-
-
 class LMulI: public LTemplateInstruction<1, 2, 1> {
  public:
   LMulI(LOperand* left, LOperand* right, LOperand* temp) {
@@ -2303,10 +2287,6 @@
   HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
-  static bool HasMagicNumberForDivisor(int32_t divisor);
-  static HValue* SimplifiedDividendForMathFloorOfDiv(HValue* val);
-  static HValue* SimplifiedDivisorForMathFloorOfDiv(HValue* val);
-
  private:
   enum Status {
     UNUSED,