media: gpu process ipc video decoder implementation

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index 3b684ce30b2576dda6d6a4eeed8d08a7aa65d8c8..e2612c252c3541c9fda9ee7ab7496f4f22b941d6 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -11,6 +11,9 @@ namespace switches {
 const char kAlsaDevice[] = "alsa-device";
 #endif
 
+// Enable hardware decoding through gpu process.
+const char kEnableAcceleratedDecoding[]  = "enable-accelerated-decoding";
+
 // Enable hardware decoding using OpenMax API.
 // In practice this is for ChromeOS ARM.
 const char kEnableOpenMax[] = "enable-openmax";