Add RTC_ prefix to contructormagic macros.

We must remove dependency on Chromium, i.e. we can't use Chromium's base/logging.h. That means we need to define these macros in WebRTC also when doing Chromium builds. And this causes redefinition.

* DISALLOW_ASSIGN -> RTC_DISALLOW_ASSIGN
* DISALLOW_COPY_AND_ASSIGN -> RTC_DISALLOW_COPY_AND_ASSIGN
* DISALLOW_IMPLICIT_CONSTRUCTORS -> RTC_DISALLOW_IMPLICIT_CONSTRUCTORS

Related CL: https://codereview.webrtc.org/1335923002/

BUG=chromium:468375
NOTRY=true

Review URL: https://codereview.webrtc.org/1345433002

Cr-Commit-Position: refs/heads/master@{#9953}
diff --git a/webrtc/tools/simple_command_line_parser.h b/webrtc/tools/simple_command_line_parser.h
index 6bb3313..c7bed5c 100644
--- a/webrtc/tools/simple_command_line_parser.h
+++ b/webrtc/tools/simple_command_line_parser.h
@@ -91,7 +91,7 @@
   FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, GetCommandLineFlagName);
   FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, GetCommandLineFlagValue);
 
-  DISALLOW_COPY_AND_ASSIGN(CommandLineParser);
+  RTC_DISALLOW_COPY_AND_ASSIGN(CommandLineParser);
 };
 
 }  // namespace test