media/gpu/video_encode_accelerator_perf_tests: Add MeasureProducedBitstreamQuality test case

This adds the test case to video_encode_accelerator_perf_tests
that compute SSIM and PSNR values of the bitstream produced by
VideoEncodeAccelerator.

Bug: b:174322759
Test: video_encode_accelerator_tests on atlas
Change-Id: I78817f1a91d926b3041a1c8e02a2d70c4bbf828e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2563012
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: David Staessens <dstaessens@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835986}

media/gpu/BUILD.gn

@@ -619,9 +619,12 @@ if (use_v4l2_codec || use_vaapi) {
     data = [ "//media/test/data/" ]
     deps = [
       ":buildflags",
+      "test:frame_validator",
       "test:helpers",
+      "test:test_helpers",
       "test:video_encoder",
       "test:video_encoder_test_environment",
+      "test:video_encoder_test_environment",
       "//media:test_support",
       "//testing/gtest",
     ]

media/gpu/test/video_frame_validator.h

@@ -184,7 +184,7 @@ class RawVideoFrameValidator : public VideoFrameValidator {
 };
 
 // Validate by computing PSNR from the frame to be validated and the model frame
-// acquired by |get_model_frame_cb_|. If the PSNR value is equal to or less than
+// acquired by |get_model_frame_cb_|. If the PSNR value is equal to or more than
 // |tolerance_|, the validation on the frame passes.
 class PSNRVideoFrameValidator : public VideoFrameValidator {
  public:
@@ -195,7 +195,7 @@ class PSNRVideoFrameValidator : public VideoFrameValidator {
       std::unique_ptr<VideoFrameProcessor> corrupt_frame_processor = nullptr,
       ValidationMode validation_mode = ValidationMode::kThreshold,
       double tolerance = kDefaultTolerance);
-  const std::map<size_t, double>& GetPSNRValues() { return psnr_; }
+  const std::map<size_t, double>& GetPSNRValues() const { return psnr_; }
   ~PSNRVideoFrameValidator() override;
 
  private:
@@ -220,7 +220,7 @@ class PSNRVideoFrameValidator : public VideoFrameValidator {
 };
 
 // Validate by computing SSIM from the frame to be validated and the model frame
-// acquired by |get_model_frame_cb_|. If the SSIM value is equal to or less than
+// acquired by |get_model_frame_cb_|. If the SSIM value is equal to or more than
 // |tolerance_|, the validation on the frame passes.
 class SSIMVideoFrameValidator : public VideoFrameValidator {
  public:
@@ -231,7 +231,7 @@ class SSIMVideoFrameValidator : public VideoFrameValidator {
       std::unique_ptr<VideoFrameProcessor> corrupt_frame_processor = nullptr,
       ValidationMode validation_mode = ValidationMode::kThreshold,
       double tolerance = kDefaultTolerance);
-  const std::map<size_t, double>& GetSSIMValues() { return ssim_; }
+  const std::map<size_t, double>& GetSSIMValues() const { return ssim_; }
   ~SSIMVideoFrameValidator() override;
 
  private: