[fuchsia] Update profiler assertions to allow for profiler running on a different thread.

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/address_sanitizer.h"
 #include "platform/memory_sanitizer.h"
 #include "platform/utils.h"
 
 #include "vm/allocation.h"
 #include "vm/atomic.h"
@@ skipping 433 matching lines @@
                             sample,
                             sample_buffer,
                             skip_count),
         pc_(reinterpret_cast<uword*>(pc)),
         fp_(reinterpret_cast<uword*>(fp)),
         sp_(reinterpret_cast<uword*>(sp)),
         stack_upper_(stack_upper),
         stack_lower_(stack_lower),
         has_exit_frame_(exited_dart_code) {
     if (exited_dart_code) {
-// On windows the profiler does not run on the thread being profiled.
-#if defined(_WIN32)
+// On Windows and Fuchsia the profiler does not run on the thread being
+// profiled.
+#if defined(HOST_OS_WINDOWS) || defined(HOST_OS_FUCHSIA)
       const StackFrameIterator::CrossThreadPolicy cross_thread_policy =
           StackFrameIterator::kAllowCrossThreadIteration;
 #else
       const StackFrameIterator::CrossThreadPolicy cross_thread_policy =
           StackFrameIterator::kNoCrossThreadIteration;
 #endif
       StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
                                   thread, cross_thread_policy);
       pc_ = NULL;
       fp_ = NULL;
@@ skipping 1146 matching lines @@
 
 
 ProcessedSampleBuffer::ProcessedSampleBuffer()
     : code_lookup_table_(new CodeLookupTable(Thread::Current())) {
   ASSERT(code_lookup_table_ != NULL);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart