ARM: Implement DoPower in the lithium code generator.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 57338f16d5557cca4f7d8fe08fd6d29bca805b1e..bd625aa56046207fa6a9289686fc81cb3c682ca4 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -135,6 +135,7 @@ class LCodeGen;
   V(OuterContext)                               \
   V(Parameter)                                  \
   V(PixelArrayLength)                           \
+  V(Power)                                      \
   V(PushArgument)                               \
   V(RegExpLiteral)                              \
   V(Return)                                     \
@@ -1058,6 +1059,18 @@ class LAddI: public LTemplateInstruction<1, 2, 0> {
 };
 
 
+class LPower: public LTemplateInstruction<1, 2, 0> {
+ public:
+  LPower(LOperand* left, LOperand* right) {
+    inputs_[0] = left;
+    inputs_[1] = right;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(Power, "power")
+  DECLARE_HYDROGEN_ACCESSOR(Power)
+};
+
+
 class LArithmeticD: public LTemplateInstruction<1, 2, 0> {
  public:
   LArithmeticD(Token::Value op, LOperand* left, LOperand* right)