Rename sample_app -> spinning_cube.

README.md

 Mojo
 ====
 
 Mojo is an effort to extract a common platform out of Chrome's renderer and plugin processes that can support multiple types of sandboxed content, such as HTML, Pepper, or NaCl.
 
 ## Set up your environment
 
 The instructions below only need to be done once. Note that a simple "git clone" command is not sufficient to build the source code because this repo uses the gclient command from depot_tools to manage most third party dependencies.
 
 1. Download depot_tools and make sure it is in your path:<br>http://www.chromium.org/developers/how-tos/install-depot-tools<br>
@@ skipping 185 matching lines @@
     mojo/tools/mojob.py build --android
     ```
 
 2. Push mojo_shell to to your device:
     ```
     adb install -r out/android_Debug/apks/MojoShell.apk
     ```
 
 3. Run Mojo Shell on the device:
     ```
-    mojo/tools/android_mojo_shell.py mojo:sample_app
+    mojo/tools/android_mojo_shell.py mojo:spinning_cube
     ```
 If this fails and prints:
     ```
     error: closed
     error: closed
     ```
 ... then you may not have a new enough build of Android on your device. You need L (Lollipop) or later.
 
 4. If you get a crash you won't see symbols. Use tools/android_stack_parser/stack to map back to symbols, e.g.:
     ```
     adb logcat | ./tools/android_stack_parser/stack
     ```
 
 ### On Linux
 
 1. Build the mojo target as described under [link](#buildmojo).
 
 2. Run Mojo Shell:
     ```
-    ./out/Debug/mojo_shell mojo:sample_app
+    ./out/Debug/mojo_shell mojo:spinning_cube
     ```
 
 3. Optional: Run Mojo Shell with an HTTP server
     ```
     cd out/Debug
     python -m SimpleHTTPServer 4444 &
-    ./mojo_shell --origin=http://127.0.0.1:4444 --disable-cache mojo:sample_app
+    ./mojo_shell --origin=http://127.0.0.1:4444 --disable-cache mojo:spinning_cube
     ```