Have the Debugger extension api check that it has access to the tab

Check PermissionsData::CanAccessTab() prior to attaching the debugger.

BUG=367567

Review URL: https://codereview.chromium.org/352523003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@280354 0039d316-1c4b-4281-b951-d872f2087c98
void ExtensionDevToolsClientHost::ReplacedWithAnotherClient() {
  detach_reason_ = OnDetach::REASON_REPLACED_WITH_DEVTOOLS;
}

void ExtensionDevToolsClientHost::ReplacedWithAnotherClient() {
  detach_reason_ = OnDetach::REASON_REPLACED_WITH_DEVTOOLS;
}
