Allows unboxed doubles to be disabled.

runtime/vm/cpu_arm.h

Index: runtime/vm/cpu_arm.h
===================================================================
--- runtime/vm/cpu_arm.h	(revision 36258)
+++ runtime/vm/cpu_arm.h	(working copy)
@@ -19,6 +19,7 @@
 // they may be altered for testing.
 
 enum ARMVersion {
+  ARMv5TE,
   ARMv6,
   ARMv7,
   ARMvUnknown,
@@ -36,6 +37,10 @@
     DEBUG_ASSERT(initialized_);
     return integer_division_supported_;
   }
+  static bool vfp_supported() {
+    DEBUG_ASSERT(initialized_);
+    return vfp_supported_;
+  }
   static bool neon_supported() {
     DEBUG_ASSERT(initialized_);
     return neon_supported_;
@@ -50,6 +55,10 @@
     DEBUG_ASSERT(initialized_);
     integer_division_supported_ = supported;
   }
+  static void set_vfp_supported(bool supported) {
+    DEBUG_ASSERT(initialized_);
+    vfp_supported_ = supported;
+  }
   static void set_neon_supported(bool supported) {
     DEBUG_ASSERT(initialized_);
     neon_supported_ = supported;
@@ -63,6 +72,7 @@
  private:
   static const char* hardware_;
   static bool integer_division_supported_;
+  static bool vfp_supported_;
   static bool neon_supported_;
   static ARMVersion arm_version_;
 #if defined(DEBUG)
@@ -84,6 +94,9 @@
   static bool integer_division_supported() {
     return HostCPUFeatures::integer_division_supported();
   }
+  static bool vfp_supported() {
+    return HostCPUFeatures::vfp_supported();
+  }
   static bool neon_supported() {
     return HostCPUFeatures::neon_supported();
   }