Flip HW video decode from being behind an "enable" flag to being behind a "disable" flag

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index bcd537d6b693d3f9c05dcf1fca0e4d72fd8ebff3..d8fff7b434f1273086a437fca92769a2d1394ba5 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2367,11 +2367,22 @@ WebMediaPlayer* RenderViewImpl::createMediaPlayer(
     collection->AddAudioRenderer(audio_renderer);
   }
 
+  bool use_accelerated_video_decode;

[jam, 2012/07/23 22:51:31]

nit: it would be more concise to write this as 

bool use_accelerated_video_decode = false;
#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
use_accelerated_video_decode = true;
#endif

[Ami GONE FROM CHROMIUM, 2012/07/23 22:55:51]

Yeah; my thought here was that this way would make it obvious where to flip the
switches as they become appropriate.  I'm fine going the other way, too.

+#if defined(OS_WIN)
+  use_accelerated_video_decode = false;
+#elif defined(OS_MACOSX)
+  use_accelerated_video_decode = false;
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
+  use_accelerated_video_decode = false;
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
+  use_accelerated_video_decode = true;
+#endif
+  use_accelerated_video_decode &= !CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableAcceleratedVideoDecode);
   base::WeakPtr<WebGraphicsContext3DCommandBufferImpl> context3d =
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableAcceleratedVideoDecode) ?
-      base::WeakPtr<WebGraphicsContext3DCommandBufferImpl>() :
-      RenderThreadImpl::current()->GetGpuVDAContext3D();
+      use_accelerated_video_decode ?
+      RenderThreadImpl::current()->GetGpuVDAContext3D() :
+      base::WeakPtr<WebGraphicsContext3DCommandBufferImpl>();
   if (context3d) {
     MessageLoop* factories_loop =
         RenderThreadImpl::current()->compositor_thread() ?