DevTools: Fix elements panel search in shadow host.

R=pfeldman
BUG=426815

Review URL: https://codereview.chromium.org/640953004

git-svn-id: svn://svn.chromium.org/blink/trunk@184360 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/inspector/elements/elements-panel-search-expected.txt

@@ -68,3 +68,6 @@ Searching UA shadow DOM with setting enabled:
 < d i v   i d = " i n n e r - e d i t o r " > I n p u t V a l < / d i v >
 < d i v   i d = " i n n e r - e d i t o r " > < / d i v >
 
+Running: testSearchShadowHostChildren
+< d i v   i d = " s h a d o w - h o s t - c o n t e n t " > < / d i v >
+

third_party/WebKit/LayoutTests/inspector/elements/elements-panel-search.html

@@ -157,7 +157,12 @@ function test()
                 InspectorTest.addResult("Searching UA shadow DOM with setting enabled:")
                 WebInspector.domModel.performSearch("inne" + "r-editor", true, searchCallback.bind(this, next));
             }
-        }
+        },
+
+        function testSearchShadowHostChildren(next)
+        {
+            WebInspector.domModel.performSearch("shadow-host-c" + "ontent", false, searchCallback.bind(this, next));
+        },
     ]);
 
 }
@@ -178,7 +183,7 @@ Tests that elements panel search is returning proper results.
 <span class="CASELESS"></span>
 <span data-camel="insenstive"></span>
 <div id="shadow-host">
-    <div id="shadow-root-content"></div>
+    <div id="shadow-host-content"></div>
 </div>
 <template id="shadow-dom-template">
   <div id="shadow-dom-outer">

third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp

@@ -984,6 +984,9 @@ static Node* nextNodeWithShadowDOMInMind(const Node& current, const Node* stayWi
             const ShadowRoot* shadowRoot = toShadowRoot(node);
             if (shadowRoot->olderShadowRoot())
                 return shadowRoot->olderShadowRoot();
+            Node* host = shadowRoot->host();
+            if (host && host->hasChildren())
+                return host->firstChild();
         }
         if (node->nextSibling())
             return node->nextSibling();