media: Convert I420 VideoFrame to UYVY GpuMemoryBuffer.

media/renderers/mock_gpu_video_accelerator_factories.cc

Index: media/renderers/mock_gpu_video_accelerator_factories.cc
diff --git a/media/renderers/mock_gpu_video_accelerator_factories.cc b/media/renderers/mock_gpu_video_accelerator_factories.cc
index 58bd5a34de7305922d0c7646097157581db251f2..637788f7c46db7d3c3c40bec9ff6e40c989f57ec 100644
--- a/media/renderers/mock_gpu_video_accelerator_factories.cc
+++ b/media/renderers/mock_gpu_video_accelerator_factories.cc
@@ -12,8 +12,12 @@ namespace {
 
 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  public:
-  GpuMemoryBufferImpl(const gfx::Size& size) : size_(size) {
-    bytes_.resize(size_.GetArea());
+  GpuMemoryBufferImpl(const gfx::Size& size, gfx::BufferFormat format)
+      : format_(format), size_(size) {
+    DCHECK(gfx::BufferFormat::R_8 == format_ ||
+           gfx::BufferFormat::UYVY_422 == format_);
+    bytes_.resize(size_.GetArea() *
+                  (format_ == gfx::BufferFormat::UYVY_422 ? 2 : 1));
   }
 
   // Overridden from gfx::GpuMemoryBuffer:
@@ -27,9 +31,13 @@ class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
     return false;
   }
   gfx::BufferFormat GetFormat() const override {
+    NOTREACHED();
     return gfx::BufferFormat::R_8;
   }
-  void GetStride(int* stride) const override { stride[0] = size_.width(); }
+  void GetStride(int* stride) const override {
+    stride[0] =
+        size_.width() * (format_ == gfx::BufferFormat::UYVY_422 ? 2 : 1);

[Andre, 2015/08/21 18:18:36]

Can we make a BytesPerElement() function and use it here and above?
Or, pass in |bytes_per_element| argument to constructor instead of |format|.

+  }
   gfx::GpuMemoryBufferId GetId() const override {
     NOTREACHED();
     return gfx::GpuMemoryBufferId(0);
@@ -43,6 +51,7 @@ class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
   }
 
  private:
+  gfx::BufferFormat format_;
   std::vector<unsigned char> bytes_;
   const gfx::Size size_;
 };
@@ -62,8 +71,8 @@ MockGpuVideoAcceleratorFactories::AllocateGpuMemoryBuffer(
     const gfx::Size& size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
-  DCHECK(gfx::BufferFormat::R_8 == format);
-  return make_scoped_ptr<gfx::GpuMemoryBuffer>(new GpuMemoryBufferImpl(size));
+  return make_scoped_ptr<gfx::GpuMemoryBuffer>(
+      new GpuMemoryBufferImpl(size, format));
 }
 
 scoped_ptr<base::SharedMemory>