Extend the ToRenderFrameHost magic to FrameTreeNode* and Shell*

content/browser/renderer_host/input/touch_action_browsertest.cc

 // Copyright 2014 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 <utility>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 102 matching lines @@
     cmd->AppendSwitchASCII(switches::kTouchEvents,
                            switches::kTouchEventsEnabled);
     // TODO(rbyers): Remove this switch once touch-action ships.
     // http://crbug.com/241964
     cmd->AppendSwitch(switches::kEnableExperimentalWebPlatformFeatures);
   }
 
   int ExecuteScriptAndExtractInt(const std::string& script) {
     int value = 0;
     EXPECT_TRUE(content::ExecuteScriptAndExtractInt(
-        shell()->web_contents(),
-        "domAutomationController.send(" + script + ")",
-        &value));
+        shell(), "domAutomationController.send(" + script + ")", &value));
     return value;
   }
 
   int GetScrollTop() {
     return ExecuteScriptAndExtractInt("document.scrollingElement.scrollTop");
   }
 
   // Generate touch events for a synthetic scroll from |point| for |distance|.
   // Returns true if the page scrolled by the desired amount, and false if
   // it didn't scroll at all.
@@ skipping 71 matching lines @@
   bool scrolled = DoTouchScroll(gfx::Point(50, 150), gfx::Vector2d(0, 45));
   EXPECT_FALSE(scrolled);
 
   EXPECT_EQ(1, ExecuteScriptAndExtractInt("eventCounts.touchstart"));
   EXPECT_GE(ExecuteScriptAndExtractInt("eventCounts.touchmove"), 1);
   EXPECT_EQ(1, ExecuteScriptAndExtractInt("eventCounts.touchend"));
   EXPECT_EQ(0, ExecuteScriptAndExtractInt("eventCounts.touchcancel"));
 }
 
 }  // namespace content