Add DPI information to video packets.

remoting/base/encoder_vp8_unittest.cc

Index: remoting/base/encoder_vp8_unittest.cc
diff --git a/remoting/base/encoder_vp8_unittest.cc b/remoting/base/encoder_vp8_unittest.cc
index 0060869cbba75e9c5db0108d9565d36138b46398..a465a95d65f50e85951c43a34566e5c84f166a86 100644
--- a/remoting/base/encoder_vp8_unittest.cc
+++ b/remoting/base/encoder_vp8_unittest.cc
@@ -62,4 +62,34 @@ TEST(EncoderVp8Test, TestSizeChangeNoLeak) {
                             base::Unretained(&callback)));
 }
 
+class EncoderDpiCallback {
+ public:
+  void DataAvailable(scoped_ptr<VideoPacket> packet) {
+    EXPECT_EQ(packet->dpi(), 96);
+  }
+};
+
+// Test that the DPI information is correctly propagated from the CaptureData
+// to the VideoPacket.
+TEST(EncoderVp8Test, TestDpiPropagation) {
+  int height = 1;
+  int width = 1;
+  const int kBytesPerPixel = 4;
+
+  EncoderVp8 encoder;
+  EncoderDpiCallback callback;
+
+  std::vector<uint8> buffer(width * height * kBytesPerPixel);
+  DataPlanes planes;
+  planes.data[0] = &buffer.front();
+  planes.strides[0] = width;
+
+  scoped_refptr<CaptureData> capture_data(new CaptureData(
+      planes, SkISize::Make(width, height), media::VideoFrame::RGB32));
+  capture_data->set_dpi(96);
+  encoder.Encode(capture_data, false,
+                 base::Bind(&EncoderDpiCallback::DataAvailable,
+                            base::Unretained(&callback)));
+}
+
 }  // namespace remoting