Fix Android black frames from MSE config changes.

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 cf166afc8fc512f13f28bf47f3deb0ee54c70253..fed4aecceedab4b65de068b9116b36b3595706b6 100644
--- a/content/common/gpu/media/android_copying_backing_strategy.cc
+++ b/content/common/gpu/media/android_copying_backing_strategy.cc
@@ -161,4 +161,33 @@ bool AndroidCopyingBackingStrategy::ArePicturesOverlayable() {
   return false;
 }
 
+void AndroidCopyingBackingStrategy::UpdatePictureBufferSize(
+    media::PictureBuffer* picture_buffer,
+    const gfx::Size& new_size) {
+  // This strategy uses 2D textures who's allocated memory is dependent on the
+  // size. To update size in all places, we must:
+  // 1) Update the PictureBuffer meta-data
+  picture_buffer->set_size(new_size);
+
+  // 2) Update the GL texture via glTextImage2D. This step assumes the caller
+  // has made our GL context current.
+  glBindTexture(GL_TEXTURE_2D, picture_buffer->texture_id());
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, new_size.width(), new_size.height(),
+               0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+  state_provider_->GetGlDecoder()->RestoreActiveTextureUnitBinding(
+      GL_TEXTURE_2D);
+
+  // 3) Update the CHROMIUM Texture's size.
+  gpu::gles2::TextureRef* texture_ref =
+      state_provider_->GetTextureForPicture(*picture_buffer);
+  RETURN_IF_NULL(texture_ref);
+  gpu::gles2::TextureManager* texture_manager =
+      state_provider_->GetGlDecoder()->GetContextGroup()->texture_manager();
+  RETURN_IF_NULL(texture_manager);
+  texture_manager->SetLevelInfo(texture_ref, GetTextureTarget(), 0, GL_RGBA,
+                                new_size.width(), new_size.height(), 1, 0,
+                                GL_RGBA, GL_UNSIGNED_BYTE,
+                                gfx::Rect(new_size.width(), new_size.height()));

[liberato (no reviews please), 2016/03/07 16:39:16]

i think that gfx::Rect(new_size) works.

[chcunningham, 2016/03/08 03:19:36]

Done.

+}
+
 }  // namespace content