Fix WebBluetooth generator to distinguish between different methods.

third_party/WebKit/LayoutTests/bluetooth/README

 Web Bluetooth API LayoutTests README
 
 This directory contains Web Bluetooth API layout tests.
 
 # generator.py
 
-The following files are generated by the generator.py script:
- - /getPrimaryService/gen-*
- - /getPrimaryServices/gen-*
+TL;DR

[scheib, 2016/12/02 22:40:36]

:P I have TL;DR phobia. Just remove the "TL;DR" line and leave the summary.
"Overview" Also seems unnecessary, but keep it you like. 

 
-TODO(crbug.com/654670): Generate tests for getCharacteristic(s) and
-readValue/writeValue/startNotifications.
+Directories in bluetooth/script-tests generate tests in bluetooth/
+
+Overview
+
+For all .js files in script-tests/, generator.py will attempt to build test
+in bluetooth/.
+
+Note that for each subdirectory in script-test there is a matching directory
+under bluetooth/.  The generator will expand CALL functions into this
+corresponding directory.
+
+Example:
+
+bluetooth/script-tests/server/get-same-object.js expanded CALL will generate 3
+files:
+
+bluetooth/server/getPrimaryService/gen-get-same-object.html
+bluetooth/server/getPrimaryServices/gen-get-same-object.html
+bluetooth/server/getPrimaryServices/gen-get-same-object-with-uuid.html
+
+This is because of the following lines CALL:
+
+gattServer.CALLS([
+        getPrimaryService('heart_rate')|
+        getPrimaryServices()|
+        getPrimaryServices('heart_rate')[UUID]]),
+
 
 Run
+
 $ python //third_party/WebKit/LayoutTests/bluetooth/generate.py
 to generate these files from templates in script-tests/*.js