feat: implement chrome.tabs.reload to fix PDF Viewer (#33711)

Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

docs/api/extensions.md

@@ -99,6 +99,7 @@ Only `chrome.storage.local` is supported; `chrome.storage.sync` and
 The following methods of `chrome.tabs` are supported:
 
 - `chrome.tabs.sendMessage`
+- `chrome.tabs.reload`
 - `chrome.tabs.executeScript`
 - `chrome.tabs.update` (partial support)
   - supported properties: `url`, `muted`.

shell/browser/extensions/api/tabs/tabs_api.cc

@@ -182,6 +182,30 @@ bool TabsExecuteScriptFunction::ShouldRemoveCSS() const {
   return false;
 }
 
+ExtensionFunction::ResponseAction TabsReloadFunction::Run() {
+  std::unique_ptr<tabs::Reload::Params> params(
+      tabs::Reload::Params::Create(args()));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+
+  bool bypass_cache = false;
+  if (params->reload_properties.get() &&
+      params->reload_properties->bypass_cache.get()) {
+    bypass_cache = *params->reload_properties->bypass_cache;
+  }
+
+  int tab_id = params->tab_id ? *params->tab_id : -1;
+  auto* contents = electron::api::WebContents::FromID(tab_id);
+  if (!contents)
+    return RespondNow(Error("No such tab"));
+
+  contents->web_contents()->GetController().Reload(
+      bypass_cache ? content::ReloadType::BYPASSING_CACHE
+                   : content::ReloadType::NORMAL,
+      true);
+
+  return RespondNow(NoArguments());
+}
+
 ExtensionFunction::ResponseAction TabsGetFunction::Run() {
   std::unique_ptr<tabs::Get::Params> params(tabs::Get::Params::Create(args()));
   EXTENSION_FUNCTION_VALIDATE(params.get());
@@ -262,17 +286,17 @@ ExtensionFunction::ResponseAction TabsGetZoomSettingsFunction::Run() {
   auto* zoom_controller = contents->GetZoomController();
   WebContentsZoomController::ZoomMode zoom_mode =
       contents->GetZoomController()->zoom_mode();
-  api::tabs::ZoomSettings zoom_settings;
+  tabs::ZoomSettings zoom_settings;
   ZoomModeToZoomSettings(zoom_mode, &zoom_settings);
   zoom_settings.default_zoom_factor = std::make_unique<double>(
       blink::PageZoomLevelToZoomFactor(zoom_controller->GetDefaultZoomLevel()));
 
   return RespondNow(
-      ArgumentList(api::tabs::GetZoomSettings::Results::Create(zoom_settings)));
+      ArgumentList(tabs::GetZoomSettings::Results::Create(zoom_settings)));
 }
 
 ExtensionFunction::ResponseAction TabsSetZoomSettingsFunction::Run() {
-  using api::tabs::ZoomSettings;
+  using tabs::ZoomSettings;
 
   std::unique_ptr<tabs::SetZoomSettings::Params> params(
       tabs::SetZoomSettings::Params::Create(args()));

shell/browser/extensions/api/tabs/tabs_api.h

@@ -46,9 +46,19 @@ class TabsExecuteScriptFunction : public ExecuteCodeInTabFunction {
   DECLARE_EXTENSION_FUNCTION("tabs.executeScript", TABS_EXECUTESCRIPT)
 };
 
+class TabsReloadFunction : public ExtensionFunction {
+  ~TabsReloadFunction() override {}
+
+  ResponseAction Run() override;
+
+  DECLARE_EXTENSION_FUNCTION("tabs.reload", TABS_RELOAD)
+};
+
 class TabsGetFunction : public ExtensionFunction {
   ~TabsGetFunction() override {}
+
   ResponseAction Run() override;
+
   DECLARE_EXTENSION_FUNCTION("tabs.get", TABS_GET)
 };
 

shell/common/extensions/api/tabs.json

@@ -120,6 +120,27 @@
       }
     ],
     "functions": [
+      {
+        "name": "reload",
+        "type": "function",
+        "description": "Reload a tab.",
+        "parameters": [
+          {"type": "integer", "name": "tabId", "minimum": 0, "optional": true, "description": "The ID of the tab to reload; defaults to the selected tab of the current window."},
+          {
+            "type": "object",
+            "name": "reloadProperties",
+            "optional": true,
+            "properties": {
+              "bypassCache": {
+                "type": "boolean",
+                "optional": true,
+                "description": "Whether using any local cache. Default is false."
+              }
+            }
+          },
+          {"type": "function", "name": "callback", "optional": true, "parameters": []}
+        ]
+      },
       {
         "name": "get",
         "type": "function",