Don't require VDAs to return all PictureBuffers at once.

content/common/gpu/media/android_copying_backing_strategy.cc

Index: content/common/gpu/media/android_copying_backing_strategy.cc
diff --git a/content/common/gpu/media/android_copying_backing_strategy.cc b/content/common/gpu/media/android_copying_backing_strategy.cc
index 912ba4534f331e1eba97954ea9674c45f7283769..30e4bc1aa20798bd78fcc59c9a77a343a063151f 100644
--- a/content/common/gpu/media/android_copying_backing_strategy.cc
+++ b/content/common/gpu/media/android_copying_backing_strategy.cc
@@ -17,13 +17,6 @@
 
 namespace content {
 
-// TODO(liberato): It is unclear if we have an issue with deadlock during
-// playback if we lower this.  Previously (crbug.com/176036), a deadlock
-// could occur during preroll.  More recent tests have shown some
-// instability with kNumPictureBuffers==2 with similar symptoms
-// during playback.  crbug.com/:531588 .
-enum { kNumPictureBuffers = media::limits::kMaxVideoFrames + 1 };
-
 const static GLfloat kIdentityMatrix[16] = {1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
                                             0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f,
                                             0.0f, 0.0f, 0.0f, 1.0f};
@@ -48,10 +41,6 @@ void AndroidCopyingBackingStrategy::Cleanup(
     glDeleteTextures(1, &surface_texture_id_);
 }
 
-uint32 AndroidCopyingBackingStrategy::GetNumPictureBuffers() const {
-  return kNumPictureBuffers;
-}
-
 uint32 AndroidCopyingBackingStrategy::GetTextureTarget() const {
   return GL_TEXTURE_2D;
 }