Reland "Remove WTFLogAlways in blink"

This is a reland of 935a591a.

Original change's description:

>Remove WTFLogAlways in blink

>As a step not to use utilities in Assertions.h, this CL removes both WTFLogAlways() and its all
>of uses in the blink. Additionally vprintf_stderr_with_trailing_newline() is also removed because
>it has been only using by WTFLogAlways().

Bug: 638849
Change-Id: I7120ca5b70a115bb1c45db57f077254eef57b140
Reviewed-on: https://chromium-review.googlesource.com/792550
Commit-Queue: Gyuyoung Kim <gyuyoung.kim@lge.com>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519538}

third_party/WebKit/Source/platform/wtf/Assertions.cpp

@@ -96,30 +96,6 @@ void vprintf_stderr_common(const char* format, va_list args) {
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 #endif
 
-static void vprintf_stderr_with_trailing_newline(const char* format,
-                                                 va_list args) {
-  size_t formatLength = strlen(format);
-  if (formatLength && format[formatLength - 1] == '\n') {
-    vprintf_stderr_common(format, args);
-    return;
-  }
-
-  std::unique_ptr<char[]> formatWithNewline =
-      WrapArrayUnique(new char[formatLength + 2]);
-  memcpy(formatWithNewline.get(), format, formatLength);
-  formatWithNewline[formatLength] = '\n';
-  formatWithNewline[formatLength + 1] = 0;
-
-  vprintf_stderr_common(formatWithNewline.get(), args);
-}
-
 #if defined(COMPILER_GCC)
 #pragma GCC diagnostic pop
 #endif
-
-void WTFLogAlways(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  vprintf_stderr_with_trailing_newline(format, args);
-  va_end(args);
-}

third_party/WebKit/Source/platform/wtf/Assertions.h

@@ -36,10 +36,6 @@
 // New code shouldn't use this function. This function will be deprecated.
 void vprintf_stderr_common(const char* format, va_list args);
 
-// WTFLogAlways() is deprecated. crbug.com/638849
-WTF_EXPORT PRINTF_FORMAT(1, 2)  // NOLINT
-    void WTFLogAlways(const char* format, ...);
-
 #define DCHECK_AT(assertion, file, line)                            \
   LAZY_STREAM(logging::LogMessage(file, line, #assertion).stream(), \
               DCHECK_IS_ON() ? !(assertion) : false)