android: Change OutputSurfaceWithoutParent max swaps to 1.

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index a75b5ccacdab4d94023b84af9c43a95457f3cd1f..05e121390193db3bb72a2257fc542bc1f16fc41a 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -67,7 +67,7 @@ namespace content {
 
 namespace {
 
-const unsigned int kMaxSwapBuffers = 2U;
+const unsigned int kMaxSwapBuffers = 1U;
 
 // Used to override capabilities_.adjust_deadline_for_parent to false
 class OutputSurfaceWithoutParent : public cc::OutputSurface,
@@ -85,7 +85,7 @@ class OutputSurfaceWithoutParent : public cc::OutputSurface,
             base::Bind(&OutputSurfaceWithoutParent::OnSwapBuffersCompleted,
                        base::Unretained(this))) {
     capabilities_.adjust_deadline_for_parent = false;
-    capabilities_.max_frames_pending = 2;
+    capabilities_.max_frames_pending = 1;

[no sievers, 2015/09/30 22:20:25]

nit: kMaxSwapBuffers?

[brianderson, 2015/10/01 00:20:12]

This refers to a different setting that will be used by cc::Display. I've added
a new kConstant for that in the latest patch.

   }
 
   ~OutputSurfaceWithoutParent() override { compositor_->RemoveObserver(this); }