Revert of Plugins: Remove Shadow DOM Plugin Placeholder

chrome/renderer/chrome_content_renderer_client_browsertest.cc

Index: chrome/renderer/chrome_content_renderer_client_browsertest.cc
diff --git a/chrome/renderer/chrome_content_renderer_client_browsertest.cc b/chrome/renderer/chrome_content_renderer_client_browsertest.cc
index 3424e5c34e623a07ad0cebc1ddd35ce21995cb6f..f3735391789e65afca5e270d2f9a50f62745a7a4 100644
--- a/chrome/renderer/chrome_content_renderer_client_browsertest.cc
+++ b/chrome/renderer/chrome_content_renderer_client_browsertest.cc
@@ -14,6 +14,7 @@
 #include "chrome/common/render_messages.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/renderer/chrome_content_renderer_client.h"
+#include "chrome/renderer/plugins/shadow_dom_plugin_placeholder.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/renderer/render_frame.h"
@@ -70,3 +71,104 @@
       GetMainFrame(), GURL("http://example.com/"), "GET", false, false,
       &unused));
 }
+
+namespace {
+
+// Intercepts plugin info IPCs for a mock render thread within its scope,
+// and allows tests to mock the response to each request.
+class ScopedMockPluginInfoFilter : public IPC::Listener, public IPC::Sender {
+ public:
+  explicit ScopedMockPluginInfoFilter(
+      content::MockRenderThread* mock_render_thread)
+      : sink_(mock_render_thread->sink()), sender_(mock_render_thread) {
+    sink_.AddFilter(this);
+  }
+  ~ScopedMockPluginInfoFilter() override { sink_.RemoveFilter(this); }
+
+  bool OnMessageReceived(const IPC::Message& message) override {
+    IPC_BEGIN_MESSAGE_MAP(ScopedMockPluginInfoFilter, message)
+      IPC_MESSAGE_HANDLER(ChromeViewHostMsg_GetPluginInfo, OnGetPluginInfo)
+      IPC_MESSAGE_UNHANDLED(return false)
+    IPC_END_MESSAGE_MAP()
+    return true;
+  }
+
+  bool Send(IPC::Message* message) override { return sender_->Send(message); }
+
+  MOCK_METHOD5(OnGetPluginInfo,
+               void(int render_frame_id,
+                    const GURL& url,
+                    const GURL& top_origin_url,
+                    const std::string& mime_type,
+                    ChromeViewHostMsg_GetPluginInfo_Output* output));
+
+ private:
+  IPC::TestSink& sink_;
+  IPC::Sender* sender_;
+  DISALLOW_COPY_AND_ASSIGN(ScopedMockPluginInfoFilter);
+};
+
+}  // namespace
+
+class CreatePluginPlaceholderTest : public ChromeRenderViewTest {
+ protected:
+  void SetUp() override {
+    ChromeRenderViewTest::SetUp();
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kEnablePluginPlaceholderShadowDom);
+  }
+
+  content::RenderFrame* GetMainRenderFrame() const {
+    return view_->GetMainRenderFrame();
+  }
+
+  int GetRoutingID() const { return GetMainRenderFrame()->GetRoutingID(); }
+};
+
+TEST_F(CreatePluginPlaceholderTest, MissingPlugin) {
+  GURL url("http://www.example.com/example.swf");
+  std::string mime_type("application/x-shockwave-flash");
+
+  blink::WebPluginParams params;
+  params.url = url;
+  params.mimeType = base::ASCIIToUTF16(mime_type);
+
+  ChromeViewHostMsg_GetPluginInfo_Output output;
+  output.status = ChromeViewHostMsg_GetPluginInfo_Status::kNotFound;
+
+  ScopedMockPluginInfoFilter filter(render_thread_.get());
+#if defined(ENABLE_PLUGINS)
+  EXPECT_CALL(filter, OnGetPluginInfo(GetRoutingID(), url, _, mime_type, _))
+      .WillOnce(SetArgPointee<4>(output));
+#endif
+
+  scoped_ptr<blink::WebPluginPlaceholder> placeholder =
+      content_renderer_client_->CreatePluginPlaceholder(
+          GetMainRenderFrame(), GetMainFrame(), params);
+  ASSERT_NE(nullptr, placeholder);
+  EXPECT_EQ(l10n_util::GetStringUTF16(IDS_PLUGIN_NOT_SUPPORTED),
+            placeholder->message());
+}
+
+TEST_F(CreatePluginPlaceholderTest, PluginFound) {
+  GURL url("http://www.example.com/example.swf");
+  std::string mime_type(content::kFlashPluginSwfMimeType);
+
+  blink::WebPluginParams params;
+  params.url = url;
+  params.mimeType = base::ASCIIToUTF16(mime_type);
+
+  ChromeViewHostMsg_GetPluginInfo_Output output;
+  output.status = ChromeViewHostMsg_GetPluginInfo_Status::kAllowed;
+
+  ScopedMockPluginInfoFilter filter(render_thread_.get());
+#if defined(ENABLE_PLUGINS)
+  EXPECT_CALL(filter, OnGetPluginInfo(GetRoutingID(), url, _, mime_type, _))
+      .WillOnce(SetArgPointee<4>(output));
+#endif
+
+  scoped_ptr<blink::WebPluginPlaceholder> placeholder =
+      content_renderer_client_->CreatePluginPlaceholder(
+          GetMainRenderFrame(), GetMainFrame(), params);
+  EXPECT_EQ(nullptr, placeholder);
+}