Added slow_assert macro and flag for slow development assertions in the VM.

runtime/platform/assert.h

 // Copyright (c) 2012, 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.
 
 #ifndef PLATFORM_ASSERT_H_
 #define PLATFORM_ASSERT_H_
 
 // TODO(5411406): include sstream for now, once we have a Utils::toString()
 // implemented for all the primitive types we can replace the usage of
 // sstream by Utils::toString()
@@ skipping 238 matching lines @@
 //       error if there is no semicolon after ASSERT(condition). This
 //       ensures that we get the same behavior on DEBUG and RELEASE builds.
 
 #define ASSERT(cond)                                                           \
   do {                                                                         \
     if (!(cond)) dart::Assert(__FILE__, __LINE__).Fail("expected: %s", #cond); \
   } while (false)
 
 // DEBUG_ASSERT allows identifiers in condition to be undeclared in release
 // mode.
-#define DEBUG_ASSERT(cond)                                                     \
-  if (!(cond)) dart::Assert(__FILE__, __LINE__).Fail("expected: %s", #cond);
+#define DEBUG_ASSERT(cond) ASSERT(cond)
 
 #else  // if defined(DEBUG)
 
 // In order to avoid variable unused warnings for code that only uses
 // a variable in an ASSERT or EXPECT, we make sure to use the macro
 // argument.
 #define ASSERT(condition) do {} while (false && (condition))
 
 #define DEBUG_ASSERT(cond)
 
@@ skipping 71 matching lines @@
 #define WARN(error)                                                           \
   dart::Expect(__FILE__, __LINE__).Fail("%s", error)
 
 #define WARN1(format, p1)                                                     \
   dart::Expect(__FILE__, __LINE__).Fail(format, (p1))
 
 #define WARN2(format, p1, p2)                                                 \
   dart::Expect(__FILE__, __LINE__).Fail(format, (p1), (p2))
 
 #endif  // PLATFORM_ASSERT_H_