Remove uses of skia::GetWritablePixels(PaintCanvas)

content/browser/renderer_host/render_widget_host_view_browsertest.cc

Index: content/browser/renderer_host/render_widget_host_view_browsertest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_browsertest.cc b/content/browser/renderer_host/render_widget_host_view_browsertest.cc
index dea46c6c853f581f3d40348a0028a8788f91a344..c67e49f494b975cb12df3b063afe8d6dbcd41716 100644
--- a/content/browser/renderer_host/render_widget_host_view_browsertest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_browsertest.cc
@@ -511,7 +511,7 @@ class CompositingRenderWidgetHostViewBrowserTestTabCapture
     bitmap.allocN32Pixels(video_frame->visible_rect().width(),
                           video_frame->visible_rect().height());
     // Don't clear the canvas because drawing a video frame by Src mode.
-    SkCanvas canvas(bitmap);
+    cc::PaintCanvas canvas(bitmap);
     video_renderer.Copy(video_frame, &canvas, media::Context3D());
 
     ReadbackRequestCallbackTest(quit_callback, bitmap, READBACK_SUCCESS);