Reland: Fix WebViewPlugin::scheduleAnimation crash

content/renderer/pepper/pepper_webplugin_impl_browsertest.cc

Index: content/renderer/pepper/pepper_webplugin_impl_browsertest.cc
diff --git a/content/renderer/pepper/pepper_webplugin_impl_browsertest.cc b/content/renderer/pepper/pepper_webplugin_impl_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6dd2e0adb6002a52166fe2b2cc4101fcb334010b
--- /dev/null
+++ b/content/renderer/pepper/pepper_webplugin_impl_browsertest.cc
@@ -0,0 +1,207 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/command_line.h"
+#include "content/public/common/content_client.h"
+#include "content/public/common/content_constants.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/common/pepper_plugin_info.h"
+#include "content/public/renderer/content_renderer_client.h"
+#include "content/public/test/render_view_test.h"
+#include "content/renderer/pepper/pepper_webplugin_impl.h"
+#include "content/renderer/pepper/plugin_instance_throttler_impl.h"
+#include "content/renderer/pepper/plugin_module.h"
+#include "content/renderer/pepper/renderer_ppapi_host_impl.h"
+#include "content/renderer/render_frame_impl.h"
+#include "content/test/test_content_client.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_core.h"
+#include "ppapi/c/ppb_graphics_2d.h"
+#include "ppapi/c/ppb_image_data.h"
+#include "ppapi/c/ppb_instance.h"
+#include "ppapi/c/ppp_instance.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/web/WebLocalFrame.h"
+
+namespace content {
+namespace {
+
+class PepperWebPluginImplBrowserTest
+    : public RenderViewTest,
+      public PluginInstanceThrottler::Observer {
+ public:
+  PepperWebPluginImplBrowserTest()
+      : throttler_(nullptr),
+        throttle_engaged_(false),
+        pp_module_(0),
+        pp_instance_(0),
+        graphics2d_(0) {}
+
+  void SetUp() override {
+    base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
+    command_line.AppendSwitchASCII(
+        switches::kOverridePluginPowerSaverForTesting, "always");
+
+    current_test_ = this;
+    RenderViewTest::SetUp();
+  }
+  void TearDown() override {
+    RenderViewTest::TearDown();
+    current_test_ = nullptr;
+  }
+  ContentClient* CreateContentClient() override {
+    return new MockContentClient;
+  }
+  ContentRendererClient* CreateContentRendererClient() override {
+    return new MockContentRendererClient;
+  }
+
+  // PluginInstanceThrottler::Observer implementation
+  void OnThrottleStateChange() override {
+    if (throttler_->IsThrottled())
+      throttle_engaged_ = true;
+  }
+
+ protected:
+  // PPP implementation
+  static const void* GetInterface(const char* name) {
+    static PPP_Instance ppp_instance = {
+        &PepperWebPluginImplBrowserTest::DidCreate,
+        &PepperWebPluginImplBrowserTest::DidDestroy,
+        &PepperWebPluginImplBrowserTest::DidChangeView,
+        &PepperWebPluginImplBrowserTest::DidChangeFocus,
+        &PepperWebPluginImplBrowserTest::HandleDocumentLoad};
+    if (!strcmp(name, PPP_INSTANCE_INTERFACE))
+      return &ppp_instance;
+    return nullptr;
+  }
+  static int InitializeModule(PP_Module module,
+                              PPB_GetInterface get_interface) {
+    EXPECT_EQ(0, current_test_->pp_module_);
+    current_test_->pp_module_ = module;
+    ppb_core_ = static_cast<const PPB_Core*>(get_interface(PPB_CORE_INTERFACE));
+    ppb_graphics2d_ = static_cast<const PPB_Graphics2D*>(
+        get_interface(PPB_GRAPHICS_2D_INTERFACE));
+    ppb_image_data_ = static_cast<const PPB_ImageData*>(
+        get_interface(PPB_IMAGEDATA_INTERFACE));
+    ppb_instance_ =
+        static_cast<const PPB_Instance*>(get_interface(PPB_INSTANCE_INTERFACE));
+    return PP_OK;
+  }
+  static void ShutdownModule() {
+    EXPECT_NE(0, current_test_->pp_module_);
+    current_test_->pp_module_ = 0;
+  }
+
+  static void DummyCallback(void*, int32_t) {}
+
+  void PaintSomething() {
+    PP_Size size = {2, 1};
+    PP_Resource image = ppb_image_data_->Create(
+        pp_instance_, ppb_image_data_->GetNativeImageDataFormat(), &size,
+        PP_TRUE);
+    int32_t* pixels = static_cast<int32_t*>(ppb_image_data_->Map(image));
+    pixels[0] = 0xff000000;
+    pixels[1] = 0xffffffff;
+    ppb_image_data_->Unmap(image);
+    ppb_graphics2d_->ReplaceContents(graphics2d_, image);
+    PP_CompletionCallback callback = {
+        &PepperWebPluginImplBrowserTest::DummyCallback, nullptr, 0};
+    ppb_graphics2d_->Flush(graphics2d_, callback);
+    ppb_core_->ReleaseResource(image);
+  }
+
+  // PPP_Instance implementation
+  static PP_Bool DidCreate(PP_Instance instance,
+                           uint32_t,
+                           const char* [],
+                           const char* []) {
+    EXPECT_EQ(0, current_test_->pp_instance_);
+    current_test_->pp_instance_ = instance;
+    PP_Size size = {2, 1};
+    current_test_->graphics2d_ =
+        ppb_graphics2d_->Create(instance, &size, PP_TRUE);
+    ppb_instance_->BindGraphics(instance, current_test_->graphics2d_);
+    return PP_TRUE;
+  }
+  static void DidDestroy(PP_Instance instance) {
+    EXPECT_NE(0, current_test_->pp_instance_);
+    current_test_->PaintSomething();
+    ppb_core_->ReleaseResource(current_test_->graphics2d_);
+    current_test_->pp_instance_ = 0;
+  }
+  static void DidChangeView(PP_Instance, PP_Resource) {}
+  static void DidChangeFocus(PP_Instance, PP_Bool) {}
+  static PP_Bool HandleDocumentLoad(PP_Instance, PP_Resource) {
+    return PP_FALSE;
+  }
+
+  static PepperPluginInfo GetPluginInfo() {
+    PepperPluginInfo info;
+    info.is_internal = true;
+    info.path = base::FilePath(FILE_PATH_LITERAL("internal-always-throttle"));
+    info.name = "Always Throttle";
+    info.mime_types.push_back(
+        WebPluginMimeType("test/always-throttle", "", ""));
+    info.internal_entry_points.get_interface =
+        &PepperWebPluginImplBrowserTest::GetInterface;
+    info.internal_entry_points.initialize_module =
+        &PepperWebPluginImplBrowserTest::InitializeModule;
+    info.internal_entry_points.shutdown_module =
+        &PepperWebPluginImplBrowserTest::ShutdownModule;
+    return info;
+  }
+
+  class MockContentClient : public TestContentClient {
+   public:
+    void AddPepperPlugins(std::vector<PepperPluginInfo>* plugins) override {
+      plugins->push_back(GetPluginInfo());
+    }
+  };
+  class MockContentRendererClient : public ContentRendererClient {
+   public:
+    bool OverrideCreatePlugin(RenderFrame* render_frame,
+                              blink::WebLocalFrame* frame,
+                              const blink::WebPluginParams& params,
+                              blink::WebPlugin** plugin) override {
+      current_test_->throttler_ = new PluginInstanceThrottlerImpl;
+      current_test_->throttler_->AddObserver(current_test_);
+      *plugin = render_frame->CreatePlugin(frame,
+          GetPluginInfo().ToWebPluginInfo(), params,
+          make_scoped_ptr(current_test_->throttler_));
+      return *plugin;
+    }
+  };
+
+  PluginInstanceThrottlerImpl* throttler_;
+  bool throttle_engaged_;
+  PP_Module pp_module_;
+  PP_Instance pp_instance_;
+  PP_Resource graphics2d_;
+  static PepperWebPluginImplBrowserTest* current_test_;
+  static const PPB_Core* ppb_core_;
+  static const PPB_Graphics2D* ppb_graphics2d_;
+  static const PPB_ImageData* ppb_image_data_;
+  static const PPB_Instance* ppb_instance_;
+};
+PepperWebPluginImplBrowserTest* PepperWebPluginImplBrowserTest::current_test_;
+const PPB_Core* PepperWebPluginImplBrowserTest::ppb_core_;
+const PPB_Graphics2D* PepperWebPluginImplBrowserTest::ppb_graphics2d_;
+const PPB_ImageData* PepperWebPluginImplBrowserTest::ppb_image_data_;
+const PPB_Instance* PepperWebPluginImplBrowserTest::ppb_instance_;
+
+// This test simulates the behavior of a plugin that emits new frames during
+// destruction. The throttler shouldn't engage and create a placeholder for
+// a to-be destroyed plugin in such case. See crbug.com/483068
+TEST_F(PepperWebPluginImplBrowserTest, NotEngageThrottleDuringDestroy) {
+  LoadHTML("<!DOCTYPE html><object type='test/always-throttle'></object>");
+  EXPECT_NE(0, pp_instance_);
+  LoadHTML("");
+  EXPECT_EQ(0, pp_instance_);
+  EXPECT_FALSE(throttle_engaged_);
+}
+
+}  // unnamed namespace
+
+}  // namespace content