plumbing for skia trace events into Chrome's about://tracing framework

content/renderer/renderer_main.cc

Index: content/renderer/renderer_main.cc
diff --git a/content/renderer/renderer_main.cc b/content/renderer/renderer_main.cc
index 634684c58fe2fabf8f591cbaf00159ea557d58d0..363fae871a99c065dc1798581dbe0ce67774633e 100644
--- a/content/renderer/renderer_main.cc
+++ b/content/renderer/renderer_main.cc
@@ -30,6 +30,7 @@
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_main_platform_delegate.h"
+#include "skia/ext/trace_event.h"
 #include "ui/base/ui_base_switches.h"
 #include "webkit/child/webkit_child_helpers.h"
 
@@ -237,6 +238,11 @@ int RendererMain(const MainFunctionParams& parameters) {
 
     platform.RunSandboxTests(no_sandbox);
 
+    // Initialize the binding beteween Chrome's tracing events
+    // and Chrome's.  Skia will take ownership of and clean up
+    // the memory allocated here.
+    SkEventTracer::SetInstance(new skia::SkChromiumEventTracer());

[piman, 2014/02/03 22:25:02]

nit: should we do this in the RenderThreadImpl initialization? That'd be more
consistent (and allow it to work in --single-process etc.)

[nduca, 2014/02/04 01:15:19]

yea definitely reder thread impl

[humper, 2014/02/04 19:58:08]

Sure, I'd be happy to move it -- this place was suggested by Nat, but if there's
a better place I'm all for it.

[humper, 2014/02/04 19:58:08]

Done.

+
     startup_timer.Stop();  // End of Startup Time Measurement.
 
     if (run_loop) {