clean-up and clarify CreatePlatformCanvas methods

content/browser/compositor/software_output_device_win.cc

Index: content/browser/compositor/software_output_device_win.cc
diff --git a/content/browser/compositor/software_output_device_win.cc b/content/browser/compositor/software_output_device_win.cc
index 2edf325b360a6681691ba6959ac103881b78519a..fd740523b83b359bd6a43f5cfb90766423f08a5b 100644
--- a/content/browser/compositor/software_output_device_win.cc
+++ b/content/browser/compositor/software_output_device_win.cc
@@ -139,7 +139,7 @@ SkCanvas* SoftwareOutputDeviceWin::BeginPaint(const gfx::Rect& damage_rect) {
       }
     }
     if (can_create_contents) {
-      contents_ = skia::CreatePlatformCanvas(
+      contents_ = skia::CreatePlatformCanvasWithSharedSection(
           viewport_pixel_size_.width(), viewport_pixel_size_.height(), true,
           shared_section, skia::CRASH_ON_FAILURE);
     }