From a48e0720762ac3f2c0c6e08b65f82f5ca8050fbd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Riku=20Palom=C3=A4ki?= <riku.palomaki@multitaction.com>
Date: Mon, 18 Mar 2019 21:07:02 +0000
Subject: [PATCH] Linux: Add OSR use_external_begin_frame support (see issue
 #1006)

---
 libcef/browser/browser_platform_delegate_create.cc           | 2 +-
 .../browser/native/browser_platform_delegate_native_linux.cc | 5 +++--
 .../browser/native/browser_platform_delegate_native_linux.h  | 3 ++-
 libcef/browser/osr/render_widget_host_view_osr.cc            | 3 +++
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/libcef/browser/browser_platform_delegate_create.cc b/libcef/browser/browser_platform_delegate_create.cc
index da0bd5845..75c05f42a 100644
--- a/libcef/browser/browser_platform_delegate_create.cc
+++ b/libcef/browser/browser_platform_delegate_create.cc
@@ -46,7 +46,7 @@ std::unique_ptr<CefBrowserPlatformDelegateNative> CreateNativeDelegate(
       window_info, background_color);
 #elif defined(OS_LINUX)
   return std::make_unique<CefBrowserPlatformDelegateNativeLinux>(
-      window_info, background_color);
+      window_info, background_color, use_external_begin_frame);
 #endif
 }
 
diff --git a/libcef/browser/native/browser_platform_delegate_native_linux.cc b/libcef/browser/native/browser_platform_delegate_native_linux.cc
index 4e7f48a28..21fb0a992 100644
--- a/libcef/browser/native/browser_platform_delegate_native_linux.cc
+++ b/libcef/browser/native/browser_platform_delegate_native_linux.cc
@@ -41,11 +41,12 @@ long GetSystemUptime() {
 
 CefBrowserPlatformDelegateNativeLinux::CefBrowserPlatformDelegateNativeLinux(
     const CefWindowInfo& window_info,
-    SkColor background_color)
+    SkColor background_color,
+    bool use_external_begin_frame)
     : CefBrowserPlatformDelegateNative(window_info,
                                        background_color,
                                        false,
-                                       false),
+                                       use_external_begin_frame),
       host_window_created_(false),
       window_widget_(nullptr),
       window_x11_(nullptr) {}
diff --git a/libcef/browser/native/browser_platform_delegate_native_linux.h b/libcef/browser/native/browser_platform_delegate_native_linux.h
index d7a54eef3..771d15134 100644
--- a/libcef/browser/native/browser_platform_delegate_native_linux.h
+++ b/libcef/browser/native/browser_platform_delegate_native_linux.h
@@ -14,7 +14,8 @@ class CefBrowserPlatformDelegateNativeLinux
     : public CefBrowserPlatformDelegateNative {
  public:
   CefBrowserPlatformDelegateNativeLinux(const CefWindowInfo& window_info,
-                                        SkColor background_color);
+                                        SkColor background_color,
+                                        bool use_external_begin_frame);
 
   // CefBrowserPlatformDelegate methods:
   void BrowserDestroyed(CefBrowserHostImpl* browser) override;
diff --git a/libcef/browser/osr/render_widget_host_view_osr.cc b/libcef/browser/osr/render_widget_host_view_osr.cc
index 50c9168ac..e2ae1e478 100644
--- a/libcef/browser/osr/render_widget_host_view_osr.cc
+++ b/libcef/browser/osr/render_widget_host_view_osr.cc
@@ -1323,6 +1323,9 @@ void CefRenderWidgetHostViewOSR::SendExternalBeginFrame() {
   DCHECK(begin_frame_args.IsValid());
   begin_frame_number_++;
 
+  if (render_widget_host_)
+    render_widget_host_->ProgressFlingIfNeeded(frame_time);
+
   if (renderer_compositor_frame_sink_) {
     GetCompositor()->context_factory_private()->IssueExternalBeginFrame(
         GetCompositor(), begin_frame_args);