[DOCS] Edit references to Chrome 31 and earlier.

native_client_sdk/src/doc/sdk/examples.rst

 .. _sdk-examples-2:
 
 .. TODO: After default toolchain is changed to pnacl, recreate the make examples.
 
 Examples
 ========
 
 Every Native Client SDK bundle comes with a folder of example applications.
 Each example demonstrates one or two key Native Client programming concepts.
 After you've :doc:`downloaded the SDK <download>`, follow the instructions
 on this page to build and run the examples.
 
 Your version of Chrome must be equal to or greater than the version of your SDK
 bundle. For example, if you're developing with the ``pepper_35`` bundle, you
 must use Google Chrome version 35 or greater. To find out what version of Chrome
 you're using, type ``about:chrome`` or ``about:version`` in the Chrome address
 bar.
 
-.. _enable-native-client:
-   
-Enable Native Client
---------------------
-
-If you are using Chrome 31 or later, you can skip this section. To run Portable
-Native Client applications you must specifically enable Native Client in Chrome:
-
-#. Type ``about:flags`` in the Chrome address bar and scroll down to "Native
-   Client".
-   
-   - If the link below "Native Client" says "Disable", then Native Client is
-     already enabled and you don't need to do anything else.
-   
-   * If the link below "Native Client" says "Enable", click the "Enable"
-     link.
-     
-#. Scroll down to the bottom of the page, and click "Relaunch Now". All browser
-   windows will restart when you relaunch Chrome.
-

[Sam Clegg, 2014/10/08 17:38:01]

I wonder its worth keeping this information around since its still needed if you
want to run NaCl (rather than PNaCl)?

How about the opening paragraph says something like this:  "If you are targeting
Portable Native Client you can skip this section.  If you want to run Native
Client outside of the chrome web store you much specifically enable Native
Client in Chrome:"

 .. _build-the-sdk-examples:
 
 Build the SDK examples
 ----------------------
 
 The Makefile scripts for the SDK examples can build multiple versions of the
 examples using any of the three SDK toolchains (newlib, glibc, and PNaCl) and in
 both release and debug configurations. Note that some examples, ``dlopen`` for
 example, build only with particular toolchains. 
 
@@ skipping 218 matching lines @@
 
 At this point, you can use the standard GDB commands to debug your NaCl module.
 The most common commands you will use to debug are ``continue``, ``step``,
 ``next``, ``break`` and ``backtrace``. See 
 :doc:`Debugging <../devguide/devcycle/debugging>` for more information about
 debugging a Native Client application.
 
 
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 .. |gear-icon| image:: /images/gear-icon.png