Reland "Initial switch to Chromium-style CHECK_* and DCHECK_* macros.".

src/checks.h

 // 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.
 
 #ifndef V8_CHECKS_H_
 #define V8_CHECKS_H_
 
+#include "include/v8.h"
 #include "src/base/logging.h"
 
 namespace v8 {
 
 class Value;
 template <class T> class Handle;
 
 namespace internal {
 
-intptr_t HeapObjectTagMask();
-
 #ifdef ENABLE_SLOW_DCHECKS
 #define SLOW_DCHECK(condition) \
   CHECK(!v8::internal::FLAG_enable_slow_asserts || (condition))
 extern bool FLAG_enable_slow_asserts;
 #else
 #define SLOW_DCHECK(condition) ((void) 0)
 const bool FLAG_enable_slow_asserts = false;
 #endif
 
 } }  // namespace v8::internal
 
+#define DCHECK_TAG_ALIGNED(address)             \
+  DCHECK((reinterpret_cast<intptr_t>(address) & \
+          ::v8::internal::kHeapObjectTagMask) == 0)
 
-void CheckNonEqualsHelper(const char* file, int line,
-                          const char* expected_source, double expected,
-                          const char* value_source, double value);
-
-void CheckEqualsHelper(const char* file, int line, const char* expected_source,
-                       double expected, const char* value_source, double value);
-
-void CheckNonEqualsHelper(const char* file, int line,
-                          const char* unexpected_source,
-                          v8::Handle<v8::Value> unexpected,
-                          const char* value_source,
-                          v8::Handle<v8::Value> value);
-
-void CheckEqualsHelper(const char* file,
-                       int line,
-                       const char* expected_source,
-                       v8::Handle<v8::Value> expected,
-                       const char* value_source,
-                       v8::Handle<v8::Value> value);
-
-#define DCHECK_TAG_ALIGNED(address) \
-  DCHECK((reinterpret_cast<intptr_t>(address) & HeapObjectTagMask()) == 0)
-
-#define DCHECK_SIZE_TAG_ALIGNED(size) DCHECK((size & HeapObjectTagMask()) == 0)
+#define DCHECK_SIZE_TAG_ALIGNED(size) \
+  DCHECK((size & ::v8::internal::kHeapObjectTagMask) == 0)
 
 #endif  // V8_CHECKS_H_