Avoid flushing the icache unnecessarily when updating target addresses in code.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index 1aaa2238a46e9cb7cdd5a28b875c1621cbbdc42e..c293921b5e166fae5cbca706d6a992996c09e382 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -763,16 +763,20 @@ class Assembler : public AssemblerBase {
                                           ConstantPoolArray* constant_pool));
   INLINE(static void set_target_address_at(Address pc,
                                            ConstantPoolArray* constant_pool,
-                                           Address target));
+                                           Address target,
+                                           ICacheFlushMode icache_flush_mode =
+                                              FLUSH_ICACHE_IF_NEEDED));
   INLINE(static Address target_address_at(Address pc, Code* code)) {
     ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
     return target_address_at(pc, constant_pool);
   }
   INLINE(static void set_target_address_at(Address pc,
                                            Code* code,
-                                           Address target)) {
+                                           Address target,
+                                           ICacheFlushMode icache_flush_mode =
+                                              FLUSH_ICACHE_IF_NEEDED)) {
     ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
-    set_target_address_at(pc, constant_pool, target);
+    set_target_address_at(pc, constant_pool, target, icache_flush_mode);
   }
 
   // Return the code target address at a call site from the return address