DevTools: add tooltip for truncated classnames and full name for title

third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js

Index: third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js
diff --git a/third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js b/third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js
index ab921035075be6a964f385da527f261060e4d969..f2722d0e821bc1e389ef2c79dd2c550b1d57424c 100644
--- a/third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js
+++ b/third_party/WebKit/Source/devtools/front_end/components/RemoteObjectPreviewFormatter.js
@@ -15,10 +15,8 @@ Components.RemoteObjectPreviewFormatter = class {
       parentElement.appendChild(this.renderPropertyPreview(preview.type, preview.subtype, description));
       return;
     }
-    if (description && preview.subtype !== 'array') {
-      var text = preview.subtype ? description : this._abbreviateFullQualifiedClassName(description);
-      parentElement.createTextChildren(text, ' ');
-    }
+    if (description && preview.subtype !== 'array')
+      parentElement.createTextChildren(description, ' ');
 
     var isArray = preview.subtype === 'array' || preview.subtype === 'typedarray';
     parentElement.createTextChild(isArray ? '[' : '{');
@@ -184,6 +182,7 @@ Components.RemoteObjectPreviewFormatter = class {
 
     if (type === 'object' && !subtype) {
       span.textContent = this._abbreviateFullQualifiedClassName(description);
+      span.title = description;
       return span;
     }