VideoCapture: Remove deep frame copy in the border to libJingle

media/base/video_frame.cc

Index: media/base/video_frame.cc
diff --git a/media/base/video_frame.cc b/media/base/video_frame.cc
index 5f0d7282c6e01aedfe0861ee90e55e2cb319b7c1..261d950146f833744d9a725ac6a8f61d1549f467 100644
--- a/media/base/video_frame.cc
+++ b/media/base/video_frame.cc
@@ -886,6 +886,23 @@ uint8* VideoFrame::data(size_t plane) const {
   return data_[plane];
 }
 
+uint8* VideoFrame::visible_data(size_t plane) const {
+  uint8* coded_data = data(plane);
+  const int coded_stride = stride(plane);
+  switch (plane) {
+    case kYPlane:
+    case kAPlane:
+      return coded_data + visible_rect_.y() * coded_stride + visible_rect_.x();
+    case kUPlane:
+    case kVPlane:
+      return coded_data + visible_rect_.y() / 2 * coded_stride +
+             visible_rect_.x() / 2;
+    default:
+      NOTIMPLEMENTED();
+      return NULL;
+  }
+}
+
 const gpu::MailboxHolder* VideoFrame::mailbox_holder() const {
   DCHECK_EQ(format_, NATIVE_TEXTURE);
   return mailbox_holder_.get();