Remove rendundant WebLocalFrame parameter in various plugin code.

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index d52fa4d886b729e2a31a920ed82dbd7470821071..cd8b735304313ffc42da1f6ebfacacb309a47a35 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -748,13 +748,12 @@ void BlinkTestRunner::ResolveBeforeInstallPromptPromise(
 }
 
 blink::WebPlugin* BlinkTestRunner::CreatePluginPlaceholder(
-    blink::WebLocalFrame* frame, const blink::WebPluginParams& params) {
+    const blink::WebPluginParams& params) {
   if (params.mime_type != "application/x-plugin-placeholder-test")
     return nullptr;
 
-  plugins::PluginPlaceholder* placeholder =
-      new plugins::PluginPlaceholder(render_view()->GetMainRenderFrame(), frame,
-                                     params, "<div>Test content</div>");
+  plugins::PluginPlaceholder* placeholder = new plugins::PluginPlaceholder(
+      render_view()->GetMainRenderFrame(), params, "<div>Test content</div>");
   return placeholder->plugin();
 }