Update to Chromium revision a106f0ab (#464641)

- Remove CefWindowInfo.transparent_painting_enabled. Set
  CefBrowserSettings.background_color to an opaque or transparent
  value instead.

libcef/browser/context.h

@@ -13,13 +13,18 @@
 #include "include/cef_app.h"
 
 #include "base/threading/platform_thread.h"
+#include "third_party/skia/include/core/SkColor.h"
 
 namespace base {
 class WaitableEvent;
 }
 
 namespace content {
-class ContentMainRunner;
+class ContentServiceManagerMainDelegate;
+}
+
+namespace service_manager {
+struct MainParams;
 }
 
 class CefBrowserHostImpl;
@@ -55,6 +60,17 @@ class CefContext {
 
   const CefSettings& settings() const { return settings_; }
 
+  // Returns the background color for the browser. If |browser_settings| is
+  // nullptr or does not specify a color then the global settings will be used.
+  // The alpha component will be either SK_AlphaTRANSPARENT or SK_AlphaOPAQUE
+  // (e.g. fully transparent or fully opaque). If |is_windowless| is
+  // STATE_DISABLED then SK_AlphaTRANSPARENT will always be returned. If
+  // |is_windowless| is STATE_ENABLED then SK_ColorTRANSPARENT may be returned
+  // to enable transparency for windowless browsers. See additional comments on
+  // CefSettings.background_color and CefBrowserSettings.background_color.
+  SkColor GetBackgroundColor(const CefBrowserSettings* browser_settings,
+                             cef_state_t windowless_state) const;
+
   CefTraceSubscriber* GetTraceSubscriber();
 
   // Populate the request context settings based on CefSettings and command-
@@ -81,7 +97,8 @@ class CefContext {
   CefSettings settings_;
 
   std::unique_ptr<CefMainDelegate> main_delegate_;
-  std::unique_ptr<content::ContentMainRunner> main_runner_;
+  std::unique_ptr<content::ContentServiceManagerMainDelegate> sm_main_delegate_;
+  std::unique_ptr<service_manager::MainParams> sm_main_params_;
   std::unique_ptr<CefTraceSubscriber> trace_subscriber_;
   std::unique_ptr<CefBrowserInfoManager> browser_info_manager_;
 };