Switch to linear filtering for video frames on Android.

content/common/gpu/media/android_copying_backing_strategy.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/media/android_copying_backing_strategy.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "content/common/gpu/media/avda_return_on_failure.h"
@@ skipping 25 matching lines @@
     LOG(ERROR) << "The copying strategy should not be initialized with a "
                   "surface id.";
     return gfx::ScopedJavaSurface();
   }
 
   // Create a texture and attach the SurfaceTexture to it.
   glGenTextures(1, &surface_texture_id_);
   glActiveTexture(GL_TEXTURE0);
   glBindTexture(GL_TEXTURE_EXTERNAL_OES, surface_texture_id_);
 
+  // Note that the target will be correctly sized, so nearest filtering is all
+  // that's needed.
   glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
   state_provider_->GetGlDecoder()->RestoreTextureUnitBindings(0);
   state_provider_->GetGlDecoder()->RestoreActiveTexture();
 
   surface_texture_ = gfx::SurfaceTexture::Create(surface_texture_id_);
 
@@ skipping 97 matching lines @@
   // moved into AVDA, and we should wait for it before doing the copy.
   // Because there were some test failures, we don't do this now but
   // instead preserve the old behavior.
 }
 
 bool AndroidCopyingBackingStrategy::ArePicturesOverlayable() {
   return false;
 }
 
 }  // namespace content