Fix some of teh scalarlist tests to use the TypedData VM class.

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 20500)
+++ runtime/vm/object.cc	(working copy)
@@ -575,7 +575,7 @@
 
 // Make unused space in an object whose type has been transformed safe
 // for traversing during GC.
-// The unused part of the transformed object is marked as an Int8Array
+// The unused part of the transformed object is marked as an TypedDataInt8Array
 // object.
 void Object::MakeUnusedSpaceTraversable(const Object& obj,
                                         intptr_t original_size,
@@ -587,16 +587,16 @@
     intptr_t leftover_size = original_size - used_size;
 
     uword addr = RawObject::ToAddr(obj.raw()) + used_size;
-    ASSERT(Int8Array::InstanceSize(0) == Object::InstanceSize());
-    // Update the leftover space as an Int8Array object.
-    RawInt8Array* raw =
-        reinterpret_cast<RawInt8Array*>(RawObject::FromAddr(addr));
+    ASSERT(TypedData::InstanceSize(0) == Object::InstanceSize());
+    // Update the leftover space as an TypedDataInt8Array object.
+    RawTypedData* raw =
+        reinterpret_cast<RawTypedData*>(RawObject::FromAddr(addr));
     uword tags = 0;
     tags = RawObject::SizeTag::update(leftover_size, tags);
-    tags = RawObject::ClassIdTag::update(kInt8ArrayCid, tags);
+    tags = RawObject::ClassIdTag::update(kTypedDataInt8ArrayCid, tags);
     raw->ptr()->tags_ = tags;
-    intptr_t leftover_len = (leftover_size - Int8Array::InstanceSize(0));
-    ASSERT(Int8Array::InstanceSize(leftover_len) == leftover_size);
+    intptr_t leftover_len = (leftover_size - TypedData::InstanceSize(0));
+    ASSERT(TypedData::InstanceSize(leftover_len) == leftover_size);
     raw->ptr()->length_ = Smi::New(leftover_len);
   }
 }