libvpx: Add VP9 decoder.

README.chromium

Index: README.chromium
===================================================================
--- README.chromium	(revision 172621)
+++ README.chromium	(working copy)
@@ -1,13 +1,13 @@
 Name: libvpx
 URL: http://www.webmproject.org
-Version: v0.9.7p1
+Version: v1.1.0
 License: BSD
 License File: source/libvpx/LICENSE
 Security Critical: yes
 
-Date: Tuesday August 16 2011
-Branch: cayuga
-Commit: 20307c70ae96c45b9b00338989b952fb334e4fc9
+Date: Tuesday December 12 2012
+Branch: vp9-preview
+Commit: b192d99f7367871908551ca940e06b7cb94e760b
 
 Description:
 Contains the sources used to compile libvpx binaries used by Google Chrome and
@@ -24,17 +24,20 @@
 
    ./update_libvpx.sh [branch name]
 
-2. Generate updated .gypi files.
+2. Generate updated .gypi and config files.
 
    ./generate_gypi.sh
 
-3. Commit the change.
+3. Update this README with any Version, Date, Branch, and Commit changes.
 
+4. Commit the changes in root (I.e README & .gypi files), source/libvpx, and
+   source/config directories.
+
 Tools needed to build libvpx:
 
 - generate_gypi.sh
 
-Generate .gypi files that contain the source list for each platform.
+Generate config and .gypi files that contain the source list for each platform.
 Configuration for the build is taken from vpx_config.h for each platform.
 
 - lint_config.sh