Fix cancelling permission requests on Android when the PermissionRequestManager is enabled

chrome/browser/ui/permission_bubble/permission_prompt.h

Index: chrome/browser/ui/permission_bubble/permission_prompt.h
diff --git a/chrome/browser/ui/permission_bubble/permission_prompt.h b/chrome/browser/ui/permission_bubble/permission_prompt.h
index 3b0f8683b0f723c9c889713d62f5c5f1eccd7254..607fe9ab34ab89ad165cc5e13606b1b38001c95c 100644
--- a/chrome/browser/ui/permission_bubble/permission_prompt.h
+++ b/chrome/browser/ui/permission_bubble/permission_prompt.h
@@ -55,10 +55,13 @@ class PermissionPrompt {
   // if there is no prompt showing.
   virtual void Show() = 0;
 
-  // Returns true if the view can accept a new Show() command to coalesce
-  // requests. Currently the policy is that this should return true if the view
-  // is being shown and the mouse is not over the view area (!IsMouseHovered).
-  virtual bool CanAcceptRequestUpdate() = 0;
+  // Try to cancel (i.e. hide and don't run callbacks) the current request and
+  // return whether it was cancelled. Currently the policy is that this should
+  // fail if the view is being shown and the mouse is not over the view area
+  // (!IsMouseHovered). This invalidates request objects from the last Show()
+  // call, so if the cancel failed, Show() will be called with the cancelled
+  // requests replaced with dummy PermissionRequest objects.
+  virtual bool MaybeCancelRequest() = 0;
 
   // Returns true if the prompt UI will manage hiding itself when the user
   // resolves the prompt, on page navigation/destruction, and on tab switching.