ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

content/app/content_main_runner.cc

Index: content/app/content_main_runner.cc
diff --git a/content/app/content_main_runner.cc b/content/app/content_main_runner.cc
index 2906e77f0d2d805215b63bd2a352c525cf788f65..659dc972a73402eff5d69aa67f052f4dbed891dd 100644
--- a/content/app/content_main_runner.cc
+++ b/content/app/content_main_runner.cc
@@ -110,6 +110,10 @@
 
 #endif  // OS_POSIX
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/native_pixmap_manager.h"
+#endif
+
 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 extern "C" {
 int tc_set_new_mode(int mode);
@@ -683,6 +687,13 @@ class ContentMainRunnerImpl : public ContentMainRunner {
     SetupCRT(command_line);
 #endif
 
+#if defined(USE_OZONE)
+    if (!ui::NativePixmapManager::GetInstance() &&
+        process_type == switches::kRendererProcess) {
+      ui::NativePixmapManager::SetInstance(ui::NativePixmapManager::Create());
+    }
+#endif
+
 #if defined(OS_POSIX)
     if (!process_type.empty()) {
       // When you hit Ctrl-C in a terminal running the browser