Increase output quality of scaler from FAST to GOOD

The android implementation already uses the GOOD quality, rather than FAST.

This positively affects the quality of the thumbnails shown on the New Tab Page.

Description of GOOD, from code comments:
Bilinear upscale + N * 50% bilinear downscales.
This is still fast enough for most purposes and
Image quality is nearly as good as the BEST option.

BUG=481978

Review URL: https://codereview.chromium.org/1115433002

Cr-Commit-Position: refs/heads/master@{#327377}

content/browser/compositor/delegated_frame_host.cc

@@ -621,7 +621,7 @@ void DelegatedFrameHost::PrepareTextureCopyOutputResult(
                  base::Passed(&release_callback),
                  base::Passed(&bitmap),
                  base::Passed(&bitmap_pixels_lock)),
-      GLHelper::SCALER_QUALITY_FAST);
+      GLHelper::SCALER_QUALITY_GOOD);
 }
 
 // static