Expose UkmService to content/

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index e58f1099eba8054b37136f46854907fe59353b47..a3d217fd94465febd92a71e324c331ac6150658f 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -87,6 +87,10 @@ namespace rappor {
 class RapporService;
 }
 
+namespace ukm {
+class UkmRecorder;
+}
+
 namespace sandbox {
 class TargetPolicy;
 }
@@ -800,6 +804,9 @@ class CONTENT_EXPORT ContentBrowserClient {
   // Returns the RapporService from the browser process.
   virtual ::rappor::RapporService* GetRapporService();
 
+  // Returns the UkmRecorder from the browser process.
+  virtual ::ukm::UkmRecorder* GetUkmRecorder();
+
   // Provides parameters for initializing the global task scheduler. Default
   // params are used if this returns nullptr.
   virtual std::unique_ptr<base::TaskScheduler::InitParams>