Source release v2.2.0-0-903 + third_party libs

Change-Id: I03f670eaeb052bc741abb347be06f8ddc58418e7

README.upgrading

@@ -1,5 +1,5 @@
-README.upgrading for Widevine CDM Partner Kit v2.1
-Date: 7/10/2014
+README.upgrading for Widevine CDM Partner Kit v2.2
+Date: 12/16/2014
 
 This document provides details on important changes between versions of the
 Widevine CDM.  Some upgrades require you to make changes to your application,
@@ -9,6 +9,29 @@ NOTE: All gyp variables have default values in platforms/global_config.gypi.
 You may override these defaults in your platform-specific gypi.
 
 
+New in v2.2.0:
+=====
+New gyp variables have been introduced to make the build more configurable:
+  * privacy_crypto_impl
+    This replaces the variable 'disable_privacy_crypto'.  To achieve the same
+    effect, set the value to 'dummy'.  Defaults to 'openssl'.
+
+ContentDecryptionModule_1::GenerateKeyRequest did not previously require the
+'type' parameter to be supplied.  This is now required, and must be set to the
+content's MIME type.
+
+ContentDecryptionModule_1::Decrypt* previously required subsamples.  This is no
+longer required.  WebM content, for example, does not contain subsamples.
+
+ContentDecryptionModule_1::Decrypt* did not previously set the size of a
+decrypted Buffer.  This has been fixed.
+
+New CDM/Host interfaces, CDM_4/Host_4, have been introduced.  CDM_1/Host_1 will
+continue to be supported until the end of Q1, 2015.  The new interface includes
+many fixes and improvements, updates to reflect the evolving EME standard, and
+the introduction of offline playback APIs.
+
+
 New in v2.1.6:
 =====
 The following methods have been removed from the CDM interface (class