Tool added to extract network traffic annotations.

tools/clang/traffic_annotation_extractor/README.md

Index: tools/clang/traffic_annotation_extractor/README.md
diff --git a/tools/clang/traffic_annotation_extractor/README.md b/tools/clang/traffic_annotation_extractor/README.md
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+# Traffic Annotation Extrator
+This is a clang tool to extract network traffic annotations. The tool is run by
+tools/traffic_annotation/traffic_annotaion_auditor. Refer to it for help on how

[battre, 2017/02/28 18:25:11]

nit: puth path in ``

[Ramin Halavati, 2017/04/06 13:32:27]

Done.

+to use.
+
+# Build on Linux
+tools/clang/scripts/update.py --bootstrap --force-local-build

[battre, 2017/02/28 18:25:11]

nit ``` before line 7 and after line 9

[Ramin Halavati, 2017/04/06 13:32:27]

Done.

+  --without-android --extra-tools blink_gc_plugin plugins
+  rewrite_to_chrome_style traffic_annotation_extractor
+
+# Build on Window
+1. Either open a "VS2015 x64 Native Tools Command Prompt", or open a normal
+   command prompt and run "depot_tools\win_toolchain\vs_fies\

[battre, 2017/02/28 18:25:11]

vs_files?

[Ramin Halavati, 2017/04/06 13:32:27]

Done.

+   $long_autocompleted_hash\win_sdk\bin\setenv.cmd /x64"

[battre, 2017/02/28 18:25:11]

nit: command in ` ... `

[Ramin Halavati, 2017/04/06 13:32:28]

Done.

+2. Run python tools/clang/scripts/update.py --bootstrap --force-local-build
+   --without-android --extra-tools blink_gc_plugin plugins
+   rewrite_to_chrome_style traffic_annotation_extractor

[battre, 2017/02/28 18:25:11]

again: ` ... `

[Ramin Halavati, 2017/04/06 13:32:27]

Done.

+