Set user_gesture bit at NavigationHandle creation time.

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index 98757a7303b941944faab686f576dac7240c021c..ad0f6ff7996a5802947b86f28db89d34f8f72f82 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -15,6 +15,7 @@
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
+#include "content/common/navigation_gesture.h"
 #include "content/common/resource_request_body_impl.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
@@ -144,7 +145,7 @@ struct CONTENT_EXPORT BeginNavigationParams {
   BeginNavigationParams();
   BeginNavigationParams(std::string headers,
                         int load_flags,
-                        bool has_user_gesture,
+                        NavigationGesture gesture,
                         bool skip_service_worker,
                         RequestContextType request_context_type);
   BeginNavigationParams(const BeginNavigationParams& other);
@@ -155,8 +156,8 @@ struct CONTENT_EXPORT BeginNavigationParams {
   // net::URLRequest load flags (net::LOAD_NORMAL) by default).
   int load_flags;
 
-  // True if the request was user initiated.
-  bool has_user_gesture;
+  // Indicates the gesture type.
+  NavigationGesture gesture;
 
   // True if the ServiceWorker should be skipped.
   bool skip_service_worker;
@@ -233,7 +234,7 @@ struct CONTENT_EXPORT RequestNavigationParams {
                           int current_history_list_length,
                           bool is_view_source,
                           bool should_clear_history_list,
-                          bool has_user_gesture);
+                          NavigationGesture gesture);
   RequestNavigationParams(const RequestNavigationParams& other);
   ~RequestNavigationParams();
 
@@ -325,8 +326,8 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // it will always be equal to kInvalidServiceWorkerProviderId.
   int service_worker_provider_id;
 
-  // True if the navigation originated due to a user gesture.
-  bool has_user_gesture;
+  // Indicates the gesture type.
+  NavigationGesture gesture;
 
 #if defined(OS_ANDROID)
   // The real content of the data: URL. Only used in Android WebView for