Do not use setDartFlags API as we're now passing flags by other means.

content/renderer/render_process_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <objidl.h>
 #include <mlang.h>
@@ skipping 53 matching lines @@
   webkit_glue::SetJavaScriptFlags(
       "--debugger-auto-break"
       // Enable on-demand profiling.
       " --prof --prof-lazy");
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
     webkit_glue::SetJavaScriptFlags(
         command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
   }
-
-  if (command_line.HasSwitch(switches::kDartFlags)) {
-    webkit_glue::SetDartFlags(
-        command_line.GetSwitchValueASCII(switches::kDartFlags));
-  }
 }
 
 RenderProcessImpl::~RenderProcessImpl() {
   // TODO(port): Try and limit what we pull in for our non-Win unit test bundle.
 #ifndef NDEBUG
   // log important leaked objects
   webkit_glue::CheckForLeaks();
 #endif
 
   GetShutDownEvent()->Signal();
@@ skipping 146 matching lines @@
 }
 
 void RenderProcessImpl::ClearTransportDIBCache() {
   for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
     if (shared_mem_cache_[i]) {
       FreeTransportDIB(shared_mem_cache_[i]);
       shared_mem_cache_[i] = NULL;
     }
   }
 }