Make reload button clear the network cache.

components/compositing/lib.rs

@@ -71,6 +71,8 @@ pub enum ConstellationMsg {
     AllowNavigationResponse(PipelineId, bool),
     /// Request to load a page.
     LoadUrl(TopLevelBrowsingContextId, ServoUrl),
+    /// Clear the network cache.
+    ClearCache,
     /// Request to traverse the joint session history of the provided browsing context.
     TraverseHistory(TopLevelBrowsingContextId, TraversalDirection),
     /// Inform the constellation of a window being resized.
@@ -143,6 +145,7 @@ impl fmt::Debug for ConstellationMsg {
             MediaSessionAction(..) => "MediaSessionAction",
             ChangeBrowserVisibility(..) => "ChangeBrowserVisibility",
             IMEDismissed => "IMEDismissed",
+            ClearCache => "ClearCache",
         };
         write!(formatter, "ConstellationMsg::{}", variant)
     }

components/compositing/windowing.rs

@@ -95,6 +95,8 @@ pub enum WindowEvent {
     ToggleWebRenderDebug(WebRenderDebugOption),
     /// Capture current WebRender
     CaptureWebRender,
+    /// Clear the network cache.
+    ClearCache,
     /// Toggle sampling profiler with the given sampling rate and max duration.
     ToggleSamplingProfiler(Duration, Duration),
     /// Sent when the user triggers a media action through the UA exposed media UI
@@ -137,6 +139,7 @@ impl Debug for WindowEvent {
             WindowEvent::MediaSessionAction(..) => write!(f, "MediaSessionAction"),
             WindowEvent::ChangeBrowserVisibility(..) => write!(f, "ChangeBrowserVisibility"),
             WindowEvent::IMEDismissed => write!(f, "IMEDismissed"),
+            WindowEvent::ClearCache => write!(f, "ClearCache"),
         }
     }
 }