Add flag to disable impl-side painting

cc/util.h

Index: cc/util.h
diff --git a/cc/util.h b/cc/util.h
index 6da3a697c4ac3396602903d7ac75d85fad4e7abd..22987044a56550c2a614a34aadd74c2a4c950c5a 100644
--- a/cc/util.h
+++ b/cc/util.h
@@ -5,6 +5,8 @@
 #ifndef CC_UTIL_H_
 #define CC_UTIL_H_
 
+#include "base/command_line.h"
+
 namespace cc {
 
 template<typename T> 
@@ -13,6 +15,9 @@ T RoundUp(T n, T mul)
     return ((n + mul - 1) / mul) * mul;
 }
 
+// Returns whether or not impl-side painting is enabled.
+bool IsImplSidePaintingEnabled(const CommandLine* cl);

[danakj, 2013/02/05 02:23:57]

Please don't read command line flags from in cc/. Use the values in
LayerTreeSettings instead.

Command line flags are per-process, but you may have multiple compositors in a
single process with different settings.

If you need a helper function for things in webkit/cb/ then it should live in
webkit/cb/

+
 }  // namespace cc
 
 #endif  // CC_UTIL_H_