Update V8 to r5295 as required by WebKit r65615

Change-Id: I1d72d4990703e88b7798919c7a53e12ebf76958a
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 37a1b1c..7843f00 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -597,6 +597,7 @@
   // Use --debug_code to enable.
   void Assert(Condition cc, const char* msg);
   void AssertRegisterIsRoot(Register reg, Heap::RootListIndex index);
+  void AssertFastElements(Register elements);
 
   // Like Assert(), but always enabled.
   void Check(Condition cc, const char* msg);
@@ -618,6 +619,9 @@
   // Jump if either of the registers contain a smi.
   void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi);
 
+  // Abort execution if argument is a smi. Used in debug code.
+  void AbortIfSmi(Register object);
+
   // ---------------------------------------------------------------------------
   // String utilities