[Chromecast] Support software rendering when disable-gpu used

ui/ozone/platform/cast/surface_factory_cast.cc

Index: ui/ozone/platform/cast/surface_factory_cast.cc
diff --git a/ui/ozone/platform/cast/surface_factory_cast.cc b/ui/ozone/platform/cast/surface_factory_cast.cc
index 4d5c57e020ce644111d1fdb0e02fcb51b7c375a1..f92e1c9aac5fc9e2f61881e109ebf2ab6d6c6b51 100644
--- a/ui/ozone/platform/cast/surface_factory_cast.cc
+++ b/ui/ozone/platform/cast/surface_factory_cast.cc
@@ -10,9 +10,12 @@
 #include "base/callback_helpers.h"
 #include "chromecast/public/cast_egl_platform.h"
 #include "chromecast/public/graphics_types.h"
+#include "third_party/skia/include/core/SkSurface.h"
 #include "ui/gfx/geometry/quad_f.h"
+#include "ui/gfx/vsync_provider.h"
 #include "ui/ozone/platform/cast/surface_ozone_egl_cast.h"
 #include "ui/ozone/public/native_pixmap.h"
+#include "ui/ozone/public/surface_ozone_canvas.h"
 
 using chromecast::CastEglPlatform;
 
@@ -37,8 +40,35 @@ gfx::Size GetMinDisplaySize() {
   return gfx::Size(1280, 720);
 }
 
+class DummySurface : public SurfaceOzoneCanvas {
+ public:
+  DummySurface() {}
+  ~DummySurface() override {}
+
+  // SurfaceOzoneCanvas implementation:
+  skia::RefPtr<SkSurface> GetSurface() override { return surface_; }
+
+  void ResizeCanvas(const gfx::Size& viewport_size) override {
+    surface_ = skia::AdoptRef(SkSurface::NewRaster(SkImageInfo::MakeN32Premul(
+        viewport_size.width(), viewport_size.height())));
+  }
+
+  void PresentCanvas(const gfx::Rect& damage) override {}
+
+  scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() override {
+    return nullptr;
+  }
+
+ private:
+  skia::RefPtr<SkSurface> surface_;
+
+  DISALLOW_COPY_AND_ASSIGN(DummySurface);
+};
+
 }  // namespace
 
+SurfaceFactoryCast::SurfaceFactoryCast() : SurfaceFactoryCast(nullptr) {}
+
 SurfaceFactoryCast::SurfaceFactoryCast(scoped_ptr<CastEglPlatform> egl_platform)
     : state_(kUninitialized),
       display_type_(0),
@@ -97,6 +127,14 @@ void SurfaceFactoryCast::ShutdownHardware() {
   state_ = kUninitialized;
 }
 
+scoped_ptr<SurfaceOzoneCanvas> SurfaceFactoryCast::CreateCanvasForWidget(
+    gfx::AcceleratedWidget widget) {
+  // Software canvas support only in headless mode
+  if (egl_platform_)
+    return nullptr;
+  return make_scoped_ptr<SurfaceOzoneCanvas>(new DummySurface());
+}
+
 intptr_t SurfaceFactoryCast::GetNativeDisplay() {
   CreateDisplayTypeAndWindowIfNeeded();
   return reinterpret_cast<intptr_t>(display_type_);
@@ -177,7 +215,7 @@ const int32* SurfaceFactoryCast::GetEGLSurfaceProperties(
 }
 
 scoped_refptr<NativePixmap> SurfaceFactoryCast::CreateNativePixmap(
-    gfx::AcceleratedWidget w,
+    gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {