cc: Use BeginFrameArgs

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 2dac58b691147a9b073b87274984fad8c5f9099d..a4069c034874b4ef2fda964e29d3d96acc4abcd4 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -27,6 +27,16 @@ const char kDisableImplSidePainting[] = "disable-impl-side-painting";
 // Paint content on the compositor thread instead of the main thread.
 const char kEnableImplSidePainting[] = "enable-impl-side-painting";
 
+// Disables the deadline scheduler.
+// Overrides the kDisableDeadlineShceduling flag.
+const char kDisableDeadlineScheduling[] = "disable-deadline-scheduling";
+
+// Deadline scheduling gives children compositors and the main thread an
+// interval over which they can produce content instead of always consuming
+// their input on the next BeginFrame. This allows a total pipeline latency
+// of less than 1 vsync if their intervals are properly nested.
+const char kEnableDeadlineScheduling[] = "enable-deadline-scheduling";
+
 const char kEnableTopControlsPositionCalculation[] =
     "enable-top-controls-position-calculation";
 
@@ -146,5 +156,20 @@ bool IsImplSidePaintingEnabled() {
 #endif
 }
 
+bool IsDeadlineSchedulingEnabled() {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+
+  if (command_line.HasSwitch(cc::switches::kDisableDeadlineScheduling))
+    return false;
+  else if (command_line.HasSwitch(cc::switches::kEnableDeadlineScheduling))
+    return true;
+
+#if defined(OS_ANDROID)
+  return true;
+#else
+  return false;
+#endif
+}
+
 }  // namespace switches
 }  // namespace cc