media/gpu/v4l2: remove unused argument from workarounds

The V4L2 workaround interface was taking the end position of the encoded
stream as a writable argument - this is dangerous and it doesn't even
need it, so remove it.

BUG=b:149663704
TEST=vdatest passes on Hana.

Change-Id: I6ec9b137e6e762fd999e6ae2462db4564b0e7134
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2130452
Auto-Submit: Alexandre Courbot <acourbot@chromium.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755246}

media/gpu/v4l2/v4l2_stateful_workaround.cc

@@ -34,7 +34,7 @@ class SupportResolutionChecker : public V4L2StatefulWorkaround {
       VideoCodecProfile profile);
   ~SupportResolutionChecker() override = default;
 
-  Result Apply(const uint8_t* data, size_t size, size_t* endpos) override;
+  Result Apply(const uint8_t* data, size_t size) override;
 
  private:
   using SupportedProfileMap = base::small_map<
@@ -94,8 +94,7 @@ SupportResolutionChecker::CreateIfNeeded(V4L2Device::Type device_type,
 
 V4L2StatefulWorkaround::Result SupportResolutionChecker::Apply(
     const uint8_t* data,
-    size_t size,
-    size_t* endpos) {
+    size_t size) {
   Vp8FrameHeader fhdr;
   vp8_parser_->ParseFrame(data, size, &fhdr);
   if (fhdr.IsKeyframe()) {

media/gpu/v4l2/v4l2_stateful_workaround.h

@@ -24,7 +24,7 @@ class V4L2StatefulWorkaround {
   virtual ~V4L2StatefulWorkaround() = default;
 
   // Apply the workaround.
-  virtual Result Apply(const uint8_t* data, size_t size, size_t* endpos) = 0;
+  virtual Result Apply(const uint8_t* data, size_t size) = 0;
 
  protected:
   V4L2StatefulWorkaround() = default;

media/gpu/v4l2/v4l2_video_decode_accelerator.cc

@@ -987,7 +987,7 @@ bool V4L2VideoDecodeAccelerator::AdvanceFrameFragment(const uint8_t* data,
   DCHECK(decoder_thread_.task_runner()->BelongsToCurrentThread());
 
   for (auto& workaround : workarounds_) {
-    auto result = workaround->Apply(data, size, endpos);
+    auto result = workaround->Apply(data, size);
     if (result == V4L2StatefulWorkaround::Result::NotifyError) {
       LOG(ERROR) << "Failed doing a workaround";
       NOTIFY_ERROR(PLATFORM_FAILURE);