Update to Chromium revision 248478.

- Add new CefSettings.windowless_rendering_enabled value that must be enabled when using windowless (off-screen) rendering.
- Improve naming and documentation for CefWindowInfo members.
- CefBeginTracing now completes asynchronously.
- Rename CefEndTracingAsync to CefEndTracing.
- Rename CefCompletionHandler to CefCompletionCallback.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1592 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/capi/cef_trace_capi.h

@@ -43,6 +43,7 @@ extern "C" {
 #endif
 
 #include "include/capi/cef_base_capi.h"
+#include "include/capi/cef_callback_capi.h"
 
 
 ///
@@ -68,9 +69,9 @@ typedef struct _cef_end_tracing_callback_t {
 
 
 ///
-// Start tracing events on all processes. Tracing begins immediately locally,
-// and asynchronously on child processes as soon as they receive the
-// BeginTracing request.
+// Start tracing events on all processes. Tracing is initialized asynchronously
+// and |callback| will be executed on the UI thread after initialization is
+// complete.
 //
 // If CefBeginTracing was called previously, or if a CefEndTracingAsync call is
 // pending, CefBeginTracing will fail and return false (0).
@@ -84,7 +85,8 @@ typedef struct _cef_end_tracing_callback_t {
 //
 // This function must be called on the browser process UI thread.
 ///
-CEF_EXPORT int cef_begin_tracing(const cef_string_t* categories);
+CEF_EXPORT int cef_begin_tracing(const cef_string_t* categories,
+    struct _cef_completion_callback_t* callback);
 
 ///
 // Stop tracing events on all processes.
@@ -99,7 +101,7 @@ CEF_EXPORT int cef_begin_tracing(const cef_string_t* categories);
 //
 // This function must be called on the browser process UI thread.
 ///
-CEF_EXPORT int cef_end_tracing_async(const cef_string_t* tracing_file,
+CEF_EXPORT int cef_end_tracing(const cef_string_t* tracing_file,
     cef_end_tracing_callback_t* callback);
 
 ///