Switch to using wiki page for brower test setup instructions, and cleanup readme file.

tools/testing/browser_README.txt

 Overview:
  These are the instructions to run a wide variety of browser tests using 
- test.dart --component=webdriver or 
- dart/tools/testing/perf_testing/run_perf_tests.py. Currently the results of
- run_perf_tests are uploaded to https://dartperf.googleplex.com/. 
+ test.dart or dart/tools/testing/perf_testing/run_perf_tests.py. Currently 
+ the results of run_perf_tests are uploaded to
+ https://dartperf.googleplex.com/. 
  
-============== Windows Setup ==============
+========= General Browser Setup ==========
 
-Open Internet Explorer. Open the Internet Options dialog, and move to the
-"Security" tab. Click through Internet, Local Intranet, Trusted sites, and
-Restricted site and ensure the "Enable Protected Mode" is checked for all zones
-or unchecked for all zones. Then click to the "Advanced" tab, scroll down to the
-"Security" section, and check the checkbox "Allow active content to run in files
-on My Computer."
-
-================ Mac Setup ================
-
-1) Ensure Java is installed and in your path (if you want to run Safari). If 
-   not, install the  Java jdk (so that we can run the webdriver server from its 
-  jar)
-
-2) a) Disable pop-up blocking in Safari: 
-      Preferences -> Security -> (unselect) Block pop-up windows.
-   b) copy the file in /Library/Preferences/com.apple.Safari.plist to 
-      $DARTDIR/tools/testing/com.apple.Safari.plist
-      (We do this because Safari deletes our preferences (on no pop-up 
-      blocking) if it crashes (aka times out) two times in a row.)
-
-============= All Platforms ================
-
-THE EASISET WAY:
-1) Ensure Python 2.7 is installed and in your path.
-2) Download and install Chrome in the default location if you haven't done so
-   already.
-3) Run the following script as root/administrator while standing in this
-   directory:
-   $> [sudo] python dart/tools/testing/perf_testing/webdriver_test_setup.py
-4) Profit!
-
-Example Run:
-$> tools/test.py --component=webdriver --report --timeout=20 --mode=release 
---browser=[ff | safari | chrome | ie] 
-[--frog=path/to/frog/executable/like/Release_ia32/dart-sdk/frogc
---froglib=path/to/frog/lib/like/dart/frog/lib] test_to_run(like "language" or
-"corelib")
-
-(If you don't specify frog and froglib arguments, we default to using frog with
-the VM.)
-
-
-============================================
-Okay, so you're still here? Here's the long version of what that script does if
-it didn't work for you:
-a) Install selenium library python bindings
-   (http://pypi.python.org/pypi/selenium)
-
-b) Ensure that Firefox is installed in the default location.
-
-c) Download the Chrome Driver: http://code.google.com/p/chromium/downloads/list
-   and make sure it is in your path.
-
-d) Download the selenium server (version 2.15 or newer) and place it in this 
-   directory: 
-    http://selenium.googlecode.com/files/selenium-server-standalone-2.15.0.jar
-
+See instructions on:
+https://code.google.com/p/dart/wiki/BrowserTestSetup
 
 ========= Proceed further only if you also want to run performance tests.======
 
-10)Download appengine for Python and place it in third_party (http://code.google.com/appengine/downloads.html#Google_App_Engine_SDK_for_Python):
+1) Download appengine for Python and place it in third_party (http://code.google.com/appengine/downloads.html#Google_App_Engine_SDK_for_Python):
   "dart/third_party/appengine-python/"
 
-11)Install matplotlib http://matplotlib.sourceforge.net/
+2) Install matplotlib http://matplotlib.sourceforge.net/
 
-12)Pull down benchmarks from internal repo (Google only): 
+3) Pull down benchmarks from internal repo (Google only): 
    http://chromegw.corp.google.com/viewvc/dash/trunk/internal/browserBenchmarks/README.txt?view=markup
 
-13)Create a directory in called appengine-python in third_party. Download and 
+4) Create a directory in called appengine-python in third_party. Download and 
    install App Engine in the directory you just created. 
    http://code.google.com/appengine/downloads.html
 
-14) Run the tests! While standing in dart/tools/testing/perf_testing, run 
-    $> python run_perf_tests.py --forever --verbose 
-    to run all the tests (browser performance, language correctness in the
-    browser, command line performance, and self-hosted compile time and compiled
-    code size). 
-    
-    You can run individual tests by adding the particular option (such as 
-    --language) when running create_graph.py. Type "create_graph.py -h" for a 
-    full list of the options.
+5) Run the tests! While standing in dart/tools/testing/perf_testing, run 
+   $> python run_perf_tests.py --forever --verbose 
+   to run all the tests (browser performance, language correctness in the
+   browser, command line performance, and self-hosted compile time and compiled
+   code size). 
+
+   You can run individual tests by adding the particular option (such as 
+   --language) when running create_graph.py. Type "create_graph.py -h" for a 
+   full list of the options.