Refactoring the debug creation of BeginFrameArgs objects to be in unittest code only.

cc/test/fake_output_surface.cc

Index: cc/test/fake_output_surface.cc
diff --git a/cc/test/fake_output_surface.cc b/cc/test/fake_output_surface.cc
index 352b6e49945770260571e986514247715a00cc24..334d0f3fba78500738fe799aff09a0a5c0d4b7b3 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -9,6 +9,7 @@
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/resources/returned_resource.h"
+#include "cc/test/output_test_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
@@ -98,7 +99,7 @@ void FakeOutputSurface::SetNeedsBeginFrame(bool enable) {
 }
 
 void FakeOutputSurface::OnBeginFrame() {
-  client_->BeginFrame(BeginFrameArgs::CreateForTesting());
+  client_->BeginFrame(BeginFrameArgsCreateForTesting());
 }