[DevTools] Prepare to move Popover to shadow DOM.

third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css

Index: third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css
diff --git a/third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css b/third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css
index f7a6eb5e574e3d72c74d6edaece17a96a911953c..7d6a78c16f368e9c383ae31078121e81677adce6 100644
--- a/third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css
+++ b/third_party/WebKit/Source/devtools/front_end/elements/elementsPanel.css
@@ -379,20 +379,6 @@
     cursor: text;
 }
 
-.image-preview-container {
-    background: transparent;
-    text-align: center;
-}
-
-.image-preview-container img {
-    margin: 2px auto;
-    max-width: 100px;
-    max-height: 100px;
-    background-image: url(Images/checker.png);
-    -webkit-user-select: text;
-    -webkit-user-drag: auto;
-}
-
 .metrics {
     border-bottom: 1px solid #ccc;
 }