Move platform abstraction to base library

src/base/logging.h

Index: src/base/logging.h
diff --git a/src/checks.h b/src/base/logging.h
similarity index 87%
copy from src/checks.h
copy to src/base/logging.h
index dd7a3955fb110e23a983b8d643df0265ce5d4dfe..de91077142bdfc08f1dce4ffa4c53b0dc6f757c3 100644
--- a/src/checks.h
+++ b/src/base/logging.h
@@ -2,8 +2,8 @@
 // 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_
+#ifndef V8_BASE_LOGGING_H_
+#define V8_BASE_LOGGING_H_
 
 #include <string.h>
 
@@ -30,24 +30,6 @@ extern "C" void V8_Fatal(const char* file, int line, const char* format, ...);
 #define UNREACHABLE() ((void) 0)
 #endif
 
-// Simulator specific helpers.
-// We can't use USE_SIMULATOR here because it isn't defined yet.
-#if V8_TARGET_ARCH_ARM64 && !V8_HOST_ARCH_ARM64
-  // TODO(all): If possible automatically prepend an indicator like
-  // UNIMPLEMENTED or LOCATION.
-  #define ASM_UNIMPLEMENTED(message)                                         \
-  __ Debug(message, __LINE__, NO_PARAM)
-  #define ASM_UNIMPLEMENTED_BREAK(message)                                   \
-  __ Debug(message, __LINE__,                                                \
-           FLAG_ignore_asm_unimplemented_break ? NO_PARAM : BREAK)
-  #define ASM_LOCATION(message)                                              \
-  __ Debug("LOCATION: " message, __LINE__, NO_PARAM)
-#else
-  #define ASM_UNIMPLEMENTED(message)
-  #define ASM_UNIMPLEMENTED_BREAK(message)
-  #define ASM_LOCATION(message)
-#endif
-
 
 // The CHECK macro checks that the given condition is true; if not, it
 // prints a message to stderr and aborts.
@@ -242,28 +224,14 @@ inline void CheckNonEqualsHelper(const char* file,
 #define CHECK_LE(a, b) CHECK((a) <= (b))
 
 
-#ifdef DEBUG
-#ifndef OPTIMIZED_DEBUG
-#define ENABLE_SLOW_ASSERTS    1
-#endif
-#endif
-
 namespace v8 {
-namespace internal {
-#ifdef ENABLE_SLOW_ASSERTS
-#define SLOW_ASSERT(condition) \
-  CHECK(!v8::internal::FLAG_enable_slow_asserts || (condition))
-extern bool FLAG_enable_slow_asserts;
-#else
-#define SLOW_ASSERT(condition) ((void) 0)
-const bool FLAG_enable_slow_asserts = false;
-#endif
+namespace base {
 
 // Exposed for making debugging easier (to see where your function is being
 // called, just add a call to DumpBacktrace).
 void DumpBacktrace();
 
-} }  // namespace v8::internal
+} }  // namespace v8::base
 
 
 // The ASSERT macro is equivalent to CHECK except that it only
@@ -296,4 +264,4 @@ void DumpBacktrace();
 #define EXTRA_CHECK(condition) ((void) 0)
 #endif
 
-#endif  // V8_CHECKS_H_
+#endif  // V8_BASE_LOGGING_H_