Add Open my editor

tools/chrome_extensions/open_my_editor/README.md

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+# Open My Editor (OME)
+
+OME is an enhance tools for [Chromium Code Search](https://cs.chromium.org/), 
+[Chromium Code Review](https://codereview.chromium.org/) and 
+[Chromium Build](https://build.chromium.org).
+
+For Chromium Code Search, right click on code block and select `OME`, it will 
+open the file in your editor with line number.
+
+![Chromium Code Search](./images/cs.png)
+
+For chromium Code Search, right click on symbol or filename and select 
+`OME by link` can also open file(maybe with linenumber).
+
+![Chromium Code Search by link](./images/open-by-link-cs.png)
+
+For Chromium Code Review, right click on the patchset table and select `OME`, 
+it will open all the files in this patchset.
+
+![Chromium Code Review](./images/cr.png)
+
+For Chromium Code Review, you can also right click on filename and select 
+`OME by link`.
+
+![Chromium Code Review by link](./images/open-by-link-cr.png)
+
+For any  *.chromium.org site, select the file path then right click and select 
+`OME $file`.
+
+## Installation
+
+1. Install the Chrome Extension `TODO will add link`
+2. Install dependencies `pip3 install bottle sh`, you may need to install 
+   `python3` and `python3-pip` if you don't have `pip3`.
+
+3. Start `omed.py`
+  
+    ```
+    git clone sso://user/chaopeng/ome ~/ome
+    python3 ~/ome/omed.py # you should set it on startup
+    ```
+
+4. Create your `myeditor` as your editor's wrapper (see `myeditor-example/`) and 
+   put it into path.
+5. Enjoy.
+
+## How it works
+
+In the Chrome Extension, I read the filepath and line number from right click,  
+then make a http call to `omed.py`. `omed.py` call `myeditor` to open your 
+editor.