Added new VideoFrameBuffer methods Data[YUV]() etc.

Eliminate most uses of the old methods.

To continue on this path, once we agree the new methods make sense,
the next step is to rename cricket::VideoFrame::GetVideoFrameBuffer
--> video_frame_buffer, to match the name in webrtc::VideoFrame (if we
think that name is ok?). And then start updating all code to access
planes via the VideoFrameBuffer, and delete corresponding methods in
both cricket::VideoFrame and webrtc::VideoFrame.

BUG=webrtc:5682

Review URL: https://codereview.webrtc.org/1878623002

Cr-Commit-Position: refs/heads/master@{#12407}
diff --git a/webrtc/test/fake_texture_frame.h b/webrtc/test/fake_texture_frame.h
index 9575fae..15b70d8 100644
--- a/webrtc/test/fake_texture_frame.h
+++ b/webrtc/test/fake_texture_frame.h
@@ -42,9 +42,9 @@
         new rtc::RefCountedObject<I420Buffer>(width_, height_));
     int half_height = (height_ + 1) / 2;
     int half_width = (width_ + 1) / 2;
-    memset(buffer->MutableData(kYPlane), 0, height_ * width_);
-    memset(buffer->MutableData(kUPlane), 0, half_height * half_width);
-    memset(buffer->MutableData(kVPlane), 0, half_height * half_width);
+    memset(buffer->MutableDataY(), 0, height_ * width_);
+    memset(buffer->MutableDataU(), 0, half_height * half_width);
+    memset(buffer->MutableDataV(), 0, half_height * half_width);
     return buffer;
   }
 };
diff --git a/webrtc/test/frame_utils.cc b/webrtc/test/frame_utils.cc
index 21daa44..0fad3ad 100644
--- a/webrtc/test/frame_utils.cc
+++ b/webrtc/test/frame_utils.cc
@@ -61,14 +61,14 @@
   }
   const int half_width = (f1->width() + 1) / 2;
   const int half_height = (f1->height() + 1) / 2;
-  return EqualPlane(f1->data(webrtc::kYPlane), f2->data(webrtc::kYPlane),
-                    f1->stride(webrtc::kYPlane), f2->stride(webrtc::kYPlane),
+  return EqualPlane(f1->DataY(), f2->DataY(),
+                    f1->StrideY(), f2->StrideY(),
                     f1->width(), f1->height()) &&
-         EqualPlane(f1->data(webrtc::kUPlane), f2->data(webrtc::kUPlane),
-                    f1->stride(webrtc::kUPlane), f2->stride(webrtc::kUPlane),
+         EqualPlane(f1->DataU(), f2->DataU(),
+                    f1->StrideU(), f2->StrideU(),
                     half_width, half_height) &&
-         EqualPlane(f1->data(webrtc::kVPlane), f2->data(webrtc::kVPlane),
-                    f1->stride(webrtc::kVPlane), f2->stride(webrtc::kVPlane),
+         EqualPlane(f1->DataV(), f2->DataV(),
+                    f1->StrideV(), f2->StrideV(),
                     half_width, half_height);
 }