Fix build breakage introduced in r38409

runtime/vm/profiler.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/utils.h"
 
 #include "vm/allocation.h"
 #include "vm/atomic.h"
 #include "vm/code_patcher.h"
 #include "vm/isolate.h"
@@ skipping 1726 matching lines @@
       : sample_(sample),
         stack_upper_(stack_upper),
         original_pc_(pc),
         original_fp_(fp),
         original_sp_(sp),
         lower_bound_(stack_lower) {
     ASSERT(sample_ != NULL);
   }
 
   void walk(Heap* heap) {
-    const intptr_t kMaxStep = VirtualMemory::PageSize();
+    const uword kMaxStep = VirtualMemory::PageSize();
 
     sample_->SetAt(0, original_pc_);
 
     uword* pc = reinterpret_cast<uword*>(original_pc_);
     uword* fp = reinterpret_cast<uword*>(original_fp_);
     uword* previous_fp = fp;
 
     if ((original_fp_ - original_sp_) >= kMaxStep) {
       // Gap between frame pointer and stack pointer is
       // too large.
@@ skipping 168 matching lines @@
       stackWalker.walk();
     } else {
       ProfilerNativeStackWalker stackWalker(sample, stack_lower, stack_upper,
                                             state.pc, state.fp, state.sp);
       stackWalker.walk(isolate->heap());
     }
   }
 }
 
 }  // namespace dart