Revert NotImplemented() changes in r383029 and r383047.

third_party/WebKit/Source/wtf/Assertions.h

Index: third_party/WebKit/Source/wtf/Assertions.h
diff --git a/third_party/WebKit/Source/wtf/Assertions.h b/third_party/WebKit/Source/wtf/Assertions.h
index c56caaca7d84896ae9a30fcca788250f9405f174..fa5dcaff0140aac6d80231e4781e1167c7a06f53 100644
--- a/third_party/WebKit/Source/wtf/Assertions.h
+++ b/third_party/WebKit/Source/wtf/Assertions.h
@@ -62,6 +62,10 @@
 #define ASSERT_MSG_DISABLED !ENABLE(ASSERT)
 #endif
 
+#ifndef ASSERT_ARG_DISABLED
+#define ASSERT_ARG_DISABLED !ENABLE(ASSERT)
+#endif
+
 #ifndef LOG_DISABLED
 #define LOG_DISABLED !ENABLE(ASSERT)
 #endif
@@ -81,7 +85,9 @@ typedef struct {
 } WTFLogChannel;
 
 WTF_EXPORT void WTFReportAssertionFailure(const char* file, int line, const char* function, const char* assertion);
+WTF_EXPORT void WTFReportArgumentAssertionFailure(const char* file, int line, const char* function, const char* argName, const char* assertion);
 WTF_EXPORT void WTFLog(WTFLogChannel*, const char* format, ...) WTF_ATTRIBUTE_PRINTF(2, 3);
+WTF_EXPORT void WTFLogVerbose(const char* file, int line, const char* function, WTFLogChannel*, const char* format, ...) WTF_ATTRIBUTE_PRINTF(5, 6);
 WTF_EXPORT void WTFLogAlways(const char* format, ...) WTF_ATTRIBUTE_PRINTF(1, 2);
 
 WTF_EXPORT void WTFGetBacktrace(void** stack, int* size);
@@ -195,6 +201,23 @@ WTF_EXPORT void WTFPrintBacktrace(void** stack, int size);
 #define ENABLE_SECURITY_ASSERT 0
 #endif
 
+/* ASSERT_ARG */
+
+#if ASSERT_ARG_DISABLED
+
+#define ASSERT_ARG(argName, assertion) ((void)0)
+
+#else
+
+#define ASSERT_ARG(argName, assertion) do \
+    if (!(assertion)) { \
+        WTFReportArgumentAssertionFailure(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, #argName, #assertion); \
+        CRASH(); \
+    } \
+while (0)
+
+#endif
+
 // WTF_LOG
 // This is deprecated.  Should be replaced with DVLOG(verboselevel), which works
 // only in debug build, or VLOG(verboselevel), which works in release build too.