ozone: Allow ozone evdev/kvm features to be enabled without running on ChromeOS.

base/sys_info_chromeos.cc

Index: base/sys_info_chromeos.cc
diff --git a/base/sys_info_chromeos.cc b/base/sys_info_chromeos.cc
index 29f83845dc52edbf3113cf4412bb7e3a77eb8acf..6b3e0eb691c8c3fca0b08665aa9f1be70b4e3d15 100644
--- a/base/sys_info_chromeos.cc
+++ b/base/sys_info_chromeos.cc
@@ -7,6 +7,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include "base/base_switches.h"
+#include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
@@ -50,6 +52,15 @@ class ChromeOSVersionInfo {
  public:
   ChromeOSVersionInfo() {
     Parse();
+
+    // Running as system compositor by default when running on ChromeOS.
+    is_running_as_system_compositor_ = is_running_on_chromeos_;
+
+    CommandLine* command_line = CommandLine::ForCurrentProcess();
+    if (command_line->HasSwitch(switches::kEnableSystemCompositorMode))
+      is_running_as_system_compositor_ = true;
+    if (command_line->HasSwitch(switches::kDisableSystemCompositorMode))
+      is_running_as_system_compositor_ = false;
   }
 
   void Parse() {
@@ -106,6 +117,9 @@ class ChromeOSVersionInfo {
     return lsb_release_map_;
   }
   bool is_running_on_chromeos() const { return is_running_on_chromeos_; }
+  bool is_running_as_system_compositor() const {
+    return is_running_as_system_compositor_;
+  }
 
  private:
   void ParseLsbRelease(const std::string& lsb_release) {
@@ -161,6 +175,7 @@ class ChromeOSVersionInfo {
   int32_t minor_version_;
   int32_t bugfix_version_;
   bool is_running_on_chromeos_;
+  bool is_running_as_system_compositor_;
 };
 
 static LazyInstance<ChromeOSVersionInfo>::Leaky
@@ -229,4 +244,9 @@ void SysInfo::SetChromeOSVersionInfoForTest(const std::string& lsb_release,
   g_chrome_os_version_info.Get().Parse();
 }
 
+// static
+bool SysInfo::IsRunningAsSystemCompositor() {
+  return GetChromeOSVersionInfo().is_running_as_system_compositor();
+}
+
 }  // namespace base