Add support for converting I420 software frames into NV12 hardware frames

content/common/gpu/gpu_memory_buffer_factory_io_surface.cc

Index: content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
diff --git a/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc b/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
index 23412e59ac9d451ef6decd648093471f87816b13..585beb3e67b228c96af167acc72b5695ce416adf 100644
--- a/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
+++ b/content/common/gpu/gpu_memory_buffer_factory_io_surface.cc
@@ -32,6 +32,10 @@ int32 BytesPerElement(gfx::BufferFormat format, int plane) {
     case gfx::BufferFormat::BGRA_8888:
       DCHECK_EQ(plane, 0);
       return 4;
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      static int32 bytes_per_element[] = {1, 2};
+      DCHECK_LT(static_cast<size_t>(plane), arraysize(bytes_per_element));
+      return bytes_per_element[plane];
     case gfx::BufferFormat::UYVY_422:
       DCHECK_EQ(plane, 0);
       return 2;
@@ -58,6 +62,8 @@ int32 PixelFormat(gfx::BufferFormat format) {
       return 'L008';
     case gfx::BufferFormat::BGRA_8888:
       return 'BGRA';
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      return '420v';
     case gfx::BufferFormat::UYVY_422:
       return '2vuy';
     case gfx::BufferFormat::ATC:
@@ -85,6 +91,8 @@ const GpuMemoryBufferFactory::Configuration kSupportedConfigurations[] = {
     {gfx::BufferFormat::BGRA_8888, gfx::BufferUsage::MAP},
     {gfx::BufferFormat::UYVY_422, gfx::BufferUsage::MAP},
     {gfx::BufferFormat::UYVY_422, gfx::BufferUsage::PERSISTENT_MAP},
+    {gfx::BufferFormat::YUV_420_BIPLANAR, gfx::BufferUsage::MAP},
+    {gfx::BufferFormat::YUV_420_BIPLANAR, gfx::BufferUsage::PERSISTENT_MAP},
 };
 
 }  // namespace