Documentation - Remove references to `gclient sync`

site/user/download.md

 How to download Skia
 ====================
 
-Install gclient and git
------------------------
+Install depot_tools and Git
+---------------------------
 
-Follow the instructions on
-http://www.chromium.org/developers/how-tos/install-depot-tools to download
-chromium's depot_tools (which includes gclient ).
+Follow the instructions on [Installing Chromium's
+depot_tools](http://www.chromium.org/developers/how-tos/install-depot-tools)
+to download depot_tools (which includes gclient, git-cl, and Ninja).
 
-depot_tools will also install git on your system, if it wasn't installed
+<!--?prettify lang=sh?-->
+
+    git clone 'https://chromium.googlesource.com/chromium/tools/depot_tools.git'
+    export PATH="${PWD}/depot_tools:${PATH}"
+
+depot_tools will also install Git on your system, if it wasn't installed
 already.
 
 
-
-Configure git
+Configure Git
 -------------
 
-    $ git config --global user.name "Your Name"
-    $ git config --global user.email you@example.com
+<!--?prettify lang=sh?-->
 
-Download your tree
+    git config --global user.name "Your Name"
+    git config --global user.email you@example.com
+
+Clone the Skia repository
+-------------------------
+
+<!--?prettify lang=sh?-->
+
+    git clone https://skia.googlesource.com/skia.git
+    cd skia
+
+Get Skia's dependencies and generate Ninja build files
+------------------------------------------------------
+
+<!--?prettify lang=sh?-->
+
+    python bin/sync-and-gyp
+
+<!--
+    python tools/git-sync-deps
+    python ./gyp_skia
+-->
+
+Compile all default targets
+---------------------------
+
+<!--?prettify lang=sh?-->
+
+    ninja -C out/Debug
+
+Execute Skia tests
 ------------------
 
-    $ mkdir skia
-    $ cd skia
-    $ gclient config --name . --unmanaged https://skia.googlesource.com/skia.git
-    $ gclient sync
-    $ git checkout master
+[More about Skia correctness testing tools](../dev/testing/testing)
+
+<!--?prettify lang=sh?-->
+
+    out/Debug/dm
+
+Execute Skia sample application
+-------------------------------
+
+[More about Skia's SampleApp](sample/sampleapp)
+
+<!--?prettify lang=sh?-->
+
+    out/Debug/SampleApp
 
 At this point, you have everything you need to build and use Skia!  If
 you want to make changes, and possibly contribute them back to the Skia
-project, read on...
-
-Making changes
---------------
-
-First create a branch for your changes:
-
-    $ git checkout --track origin/master -b my_feature master
-
-After making your changes, create a commit
-
-    $ git add [file1] [file2] ...
-    $ git commit
-
-If your branch gets out of date, you will need to update it:
-
-    $ git pull --rebase
-    $ gclient sync
-
-Uploading changes for review
-----------------------------
-
-    $ git cl upload
-
-You may have to enter a Google Account username and password to authenticate
-yourself to codereview.chromium.org. A free gmail account will do fine, or any
-other type of Google account.  It does not have to match the email address you
-configured using git config --global user.email above, but it can.
-
-The command output should include a URL (similar to
-https://codereview.chromium.org/111893004/ ) indicating where your changelist
-can be reviewed.
-
-Once your change has received an LGTM ("looks good to me"), you can check the
-"Commit" box on the codereview page and it will be committed on your behalf.
-
-Once your commit has gone in, you should delete the branch containing your
-change:
-
-    $ git checkout master
-    $ git branch -D my_feature
-
+project, read [How To Submit a Patch](../dev/contrib/submit).