Reland: Fix WebViewPlugin::scheduleAnimation crash

chrome/browser/plugins/plugin_power_saver_browsertest.cc

 // 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 "base/strings/string_piece.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 81 matching lines @@
 }
 
 }  // namespace
 
 class PluginPowerSaverBrowserTest : virtual public InProcessBrowserTest {
  public:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(switches::kEnablePluginPowerSaver);
     command_line->AppendSwitch(switches::kEnablePepperTesting);
     command_line->AppendSwitch(switches::kEnablePluginPlaceholderTesting);
+    command_line->AppendSwitchASCII(
+        switches::kOverridePluginPowerSaverForTesting, "ignore-list");
 
     ASSERT_TRUE(ppapi::RegisterPowerSaverTestPlugin(command_line));
   }
 
  protected:
   void LoadHTML(const char* html) {
     std::string url_str = "data:text/html;charset=utf-8,";
     url_str.append(html);
     ui_test_utils::NavigateToURL(browser(), GURL(url_str));
     EXPECT_TRUE(content::WaitForRenderFrameReady(
@@ skipping 136 matching lines @@
 
   EXPECT_FALSE(PluginLoaded(background_contents, "same_origin"));
   EXPECT_FALSE(PluginLoaded(background_contents, "small_cross_origin"));
 
   browser()->tab_strip_model()->SelectNextTab();
   EXPECT_EQ(background_contents, GetActiveWebContents());
 
   VerifyPluginMarkedEssential(background_contents, "same_origin");
   VerifyPluginIsThrottled(background_contents, "small_cross_origin");
 }