Revert of Delete webrtc::VideoFrame methods buffer and stride.

webrtc/common_video/libyuv/libyuv_unittest.cc

Index: webrtc/common_video/libyuv/libyuv_unittest.cc
diff --git a/webrtc/common_video/libyuv/libyuv_unittest.cc b/webrtc/common_video/libyuv/libyuv_unittest.cc
index 0e43e2edfb5f1eead04ac2ed903c222b8db94a80..9f92b8bb15cf19f4ef6e9d8623aeb907ba3c3fd5 100644
--- a/webrtc/common_video/libyuv/libyuv_unittest.cc
+++ b/webrtc/common_video/libyuv/libyuv_unittest.cc
@@ -20,6 +20,61 @@
 #include "webrtc/video_frame.h"
 
 namespace webrtc {
+
+int PrintBuffer(const uint8_t* buffer, int width, int height, int stride) {
+  if (buffer == NULL)
+    return -1;
+  int k;
+  const uint8_t* tmp_buffer = buffer;
+  for (int i = 0; i < height; i++) {
+    k = 0;
+    for (int j = 0; j < width; j++) {
+      printf("%d ", tmp_buffer[k++]);
+    }
+    tmp_buffer += stride;
+    printf(" \n");
+  }
+  printf(" \n");
+  return 0;
+}
+
+int PrintFrame(const VideoFrame* frame, const char* str) {
+  if (frame == NULL)
+     return -1;
+  printf("%s %dx%d \n", str, frame->width(), frame->height());
+
+  int ret = 0;
+  for (int plane_num = 0; plane_num < kNumOfPlanes; ++plane_num) {
+    PlaneType plane_type = static_cast<PlaneType>(plane_num);
+    int width = (plane_num ? (frame->width() + 1) / 2 : frame->width());
+    int height = (plane_num ? (frame->height() + 1) / 2 : frame->height());
+    ret += PrintBuffer(frame->buffer(plane_type), width, height,
+                       frame->stride(plane_type));
+  }
+  return ret;
+}
+
+
+// Create an image from on a YUV frame. Every plane value starts with a start
+// value, and will be set to increasing values.
+void CreateImage(VideoFrame* frame, int plane_offset[kNumOfPlanes]) {
+  if (frame == NULL)
+    return;
+  for (int plane_num = 0; plane_num < kNumOfPlanes; ++plane_num) {
+    int width = (plane_num != kYPlane ? (frame->width() + 1) / 2 :
+      frame->width());
+    int height = (plane_num != kYPlane ? (frame->height() + 1) / 2 :
+      frame->height());
+    PlaneType plane_type = static_cast<PlaneType>(plane_num);
+    uint8_t *data = frame->buffer(plane_type);
+    for (int i = 0; i < height; i++) {
+      for (int j = 0; j < width; j++) {
+        data[j] = static_cast<uint8_t>(i + plane_offset[plane_num] + j);
+      }
+      data += frame->stride(plane_type);
+    }
+  }
+}
 
 class TestLibYuv : public ::testing::Test {
  protected: