Add more VerifyObject calls.

Added verify object calls to SirtRef, IndirectReferenceTable,
ReferenceTable.

Removed un-needed verify object in ScopedObjectAccess / DecodeJObject
since object sources are handled.

Bug: 12934910
Change-Id: I55a46a8ea61fed2a77526eda27fd2cce97a9b125
diff --git a/runtime/indirect_reference_table.h b/runtime/indirect_reference_table.h
index 9a8e4f2..a2de726 100644
--- a/runtime/indirect_reference_table.h
+++ b/runtime/indirect_reference_table.h
@@ -267,12 +267,7 @@
    *
    * Returns kInvalidIndirectRefObject if iref is invalid.
    */
-  mirror::Object* Get(IndirectRef iref) const {
-    if (!GetChecked(iref)) {
-      return kInvalidIndirectRefObject;
-    }
-    return table_[ExtractIndex(iref)];
-  }
+  mirror::Object* Get(IndirectRef iref) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   // TODO: remove when we remove work_around_app_jni_bugs support.
   bool ContainsDirectPointer(mirror::Object* direct_pointer) const;