[Chromecast] Support software rendering when disable-gpu used

ui/ozone/platform/cast/ozone_platform_cast.cc

Index: ui/ozone/platform/cast/ozone_platform_cast.cc
diff --git a/ui/ozone/platform/cast/ozone_platform_cast.cc b/ui/ozone/platform/cast/ozone_platform_cast.cc
index bd4053e9ae93765a4a5ab7c37bf41195e2f241cf..6f2675a9d1ad297672162ec2bf781b82541fd87b 100644
--- a/ui/ozone/platform/cast/ozone_platform_cast.cc
+++ b/ui/ozone/platform/cast/ozone_platform_cast.cc
@@ -80,6 +80,10 @@ class OzonePlatformCast : public OzonePlatform {
     cursor_factory_.reset(new CursorFactoryOzone());
     input_controller_ = CreateStubInputController();
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
+
+    // Enable dummy software rendering support if GPU process disabled
+    if (base::CommandLine::ForCurrentProcess()->HasSwitch("disable-gpu"))
+      surface_factory_.reset(new SurfaceFactoryCast());
   }
   void InitializeGPU() override {

[slan, 2015/12/09 21:22:06]

I assume that InitializeGPU won't be called when --diable-gpu is passed? Maybe
we should DCHECK(!surface_factory_). Not strictly necessary though.

[halliwell, 2015/12/09 21:39:02]

Not necessary.  InitializeUI and InitializeGPU are mutually exclusive:
InitializeUI is called when using this class in browser process, InitializeGPU
in GPU process.  I don't like this much, wish they'd have different classes for
the two cases :)

     surface_factory_.reset(new SurfaceFactoryCast(egl_platform_.Pass()));