Improving canvas 2D performance by switching graphics rendering pipeline.
1. Functionality to switch from the accelerated (GPU) graphics pipeline
to the recording graphics pipeline.
2. Simple heuristic to determine when the pipeline switch would increase
performance based on how the canvas was used previously.
3. Automatically switch pipeline to increase performance based on the
heuristic if the enable-canvas-2d-dynamic-pipeline-mode-switching flag is enabled.
BUG=606687, 606686, 606685
TBR=grt@chromium.org
Review-Url: https://codereview.chromium.org/2141793002
Cr-Commit-Position: refs/heads/master@{#406585}
20 files changed
