Revert of content: Use NumberOfProcessors() / 2 raster threads.

content/browser/gpu/compositor_util.h

Index: content/browser/gpu/compositor_util.h
diff --git a/content/browser/gpu/compositor_util.h b/content/browser/gpu/compositor_util.h
index 3400fba28474e6aa2856e8a93e4ec999a2199ac1..3d23ab51d5fa695956f0f5322bb0ee299ea03870 100644
--- a/content/browser/gpu/compositor_util.h
+++ b/content/browser/gpu/compositor_util.h
@@ -49,6 +49,10 @@
 // Returns the number of raster threads to use for compositing.
 CONTENT_EXPORT int NumberOfRendererRasterThreads();
 
+// Returns the number of raster threads to use for compositing that are forced
+// by the command line.
+CONTENT_EXPORT int ForceNumberOfRendererRasterThreads();
+
 // Returns true if using cc Surfaces is allowed.
 CONTENT_EXPORT bool UseSurfacesEnabled();