Add a new GetInstance() method for singleton classes used in chrome/browser files.

chrome/browser/crash_handler_host_linux.h

Index: chrome/browser/crash_handler_host_linux.h
diff --git a/chrome/browser/crash_handler_host_linux.h b/chrome/browser/crash_handler_host_linux.h
index bc2214bf3d4dbb5b99c12cc4a97a3056a7a7d84f..b3d784ae582a76b72e09c4baeee43cab1608af75 100644
--- a/chrome/browser/crash_handler_host_linux.h
+++ b/chrome/browser/crash_handler_host_linux.h
@@ -79,6 +79,10 @@ class CrashHandlerHostLinux : public MessageLoopForIO::Watcher,
 };
 
 class PluginCrashHandlerHostLinux : public CrashHandlerHostLinux {
+ public:
+  // Returns the singleton instance.
+  static PluginCrashHandlerHostLinux* GetInstance();
+
  private:
   friend struct DefaultSingletonTraits<PluginCrashHandlerHostLinux>;
   PluginCrashHandlerHostLinux();
@@ -92,6 +96,10 @@ class PluginCrashHandlerHostLinux : public CrashHandlerHostLinux {
 };
 
 class RendererCrashHandlerHostLinux : public CrashHandlerHostLinux {
+ public:
+  // Returns the singleton instance.
+  static RendererCrashHandlerHostLinux* GetInstance();
+
  private:
   friend struct DefaultSingletonTraits<RendererCrashHandlerHostLinux>;
   RendererCrashHandlerHostLinux();