Turn ASSERTs in platform setup releated code into CHECKs

src/v8.cc

 // Copyright 2012 the V8 project 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 "src/v8.h"
 
 #include "src/assembler.h"
 #include "src/base/once.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 81 matching lines @@
   Bootstrapper::InitializeOncePerProcess();
 }
 
 
 void V8::InitializeOncePerProcess() {
   base::CallOnce(&init_once, &InitializeOncePerProcessImpl);
 }
 
 
 void V8::InitializePlatform(v8::Platform* platform) {
-  ASSERT(!platform_);
-  ASSERT(platform);
+  CHECK(!platform_);
+  CHECK(platform);
   platform_ = platform;
 }
 
 
 void V8::ShutdownPlatform() {
-  ASSERT(platform_);
+  CHECK(platform_);
   platform_ = NULL;
 }
 
 
 v8::Platform* V8::GetCurrentPlatform() {
   ASSERT(platform_);
   return platform_;
 }
 
 } }  // namespace v8::internal