Rename full_stack.cc to full_stack_tests.cc.

Also rename the accompanying plot file.

BUG=None

Review-Url: https://codereview.webrtc.org/2529293006
Cr-Commit-Position: refs/heads/master@{#15349}

webrtc/BUILD.gn

@@ -633,7 +633,7 @@ if (rtc_include_tests) {
       "modules/audio_processing/level_controller/level_controller_complexity_unittest.cc",
       "modules/audio_processing/residual_echo_detector_complexity_unittest.cc",
       "modules/remote_bitrate_estimator/remote_bitrate_estimators_test.cc",
-      "video/full_stack.cc",
+      "video/full_stack_tests.cc",
     ]
     deps = [
       "modules/audio_coding:neteq_test_support",

webrtc/video/full_stack_tests_plot.py

@@ -11,18 +11,18 @@
 
 Usage examples:
   Show end to end time for a single full stack test.
-  ./full_stack_plot.py -df end_to_end -o 600 --frames 1000 vp9_data.txt
+  ./full_stack_tests_plot.py -df end_to_end -o 600 --frames 1000 vp9_data.txt
 
   Show simultaneously PSNR and encoded frame size for two different runs of
   full stack test. Averaged over a cycle of 200 frames. Used e.g. for
   screenshare slide test.
-  ./full_stack_plot.py -c 200 -df psnr -drf encoded_frame_size \\
-                       before.txt after.txt
+  ./full_stack_tests_plot.py -c 200 -df psnr -drf encoded_frame_size \\
+                             before.txt after.txt
 
   Similar to the previous test, but multiple graphs.
-  ./full_stack_plot.py -c 200 -df psnr vp8.txt vp9.txt --next \\
-                       -c 200 -df sender_time vp8.txt vp9.txt --next \\
-                       -c 200 -df end_to_end vp8.txt vp9.txt
+  ./full_stack_tests_plot.py -c 200 -df psnr vp8.txt vp9.txt --next \\
+                             -c 200 -df sender_time vp8.txt vp9.txt --next \\
+                             -c 200 -df end_to_end vp8.txt vp9.txt
 """
 
 import argparse