Add better support for RGBA_4444 textures.

gpu/command_buffer/service/image_factory.cc

Index: gpu/command_buffer/service/image_factory.cc
diff --git a/gpu/command_buffer/service/image_factory.cc b/gpu/command_buffer/service/image_factory.cc
index 9d4e659d02caee7b94fcaaeccbe9d2cb753883be..a5c76b94c45dfef6f4f600ff28e2630796a30494 100644
--- a/gpu/command_buffer/service/image_factory.cc
+++ b/gpu/command_buffer/service/image_factory.cc
@@ -63,7 +63,24 @@ gfx::BufferUsage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
     unsigned internalformat,
     gfx::BufferFormat format) {
-  return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
+  switch (format) {
+    case gfx::BufferFormat::ATC:
+    case gfx::BufferFormat::ATCIA:
+    case gfx::BufferFormat::BGRA_8888:
+    case gfx::BufferFormat::DXT1:
+    case gfx::BufferFormat::DXT5:
+    case gfx::BufferFormat::ETC1:
+    case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::RGBA_8888:
+    case gfx::BufferFormat::RGBX_8888:
+    case gfx::BufferFormat::YUV_420:
+      return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
+    case gfx::BufferFormat::RGBA_4444:
+      return internalformat == GL_RGBA;
+  }
+
+  NOTREACHED();
+  return false;
 }
 
 // static