LayoutBox::scrollRectToVisible doesn't respect overflow:hidden property.

third_party/WebKit/Source/core/css/html.css

Index: third_party/WebKit/Source/core/css/html.css
diff --git a/third_party/WebKit/Source/core/css/html.css b/third_party/WebKit/Source/core/css/html.css
index 4b56f08e4189d7a5440d504fcb7298f8945ea67a..4c5c11828ea6c4f02e7b432e9dd7a45a9339019d 100644
--- a/third_party/WebKit/Source/core/css/html.css
+++ b/third_party/WebKit/Source/core/css/html.css
@@ -526,6 +526,17 @@ textarea {
     word-wrap: break-word;
 }
 
+input:not([type])::-webkit-scrollbar,
+input[type="email"]::-webkit-scrollbar,
+input[type="number"]::-webkit-scrollbar,
+input[type="password"]::-webkit-scrollbar,
+input[type="search"]::-webkit-scrollbar,
+input[type="telephone"]::-webkit-scrollbar,
+input[type="text"]::-webkit-scrollbar,
+input[type="url"]::-webkit-scrollbar {
+    display:none;
+}
+
 ::-webkit-input-placeholder {
     -webkit-text-security: none;
     color: darkGray;
@@ -971,19 +982,19 @@ nobr {
 
 /* states */
 
-:focus { 
+:focus {
     outline: auto 5px -webkit-focus-ring-color
 }
 
 /* Read-only text fields do not show a focus ring but do still receive focus */
-html:focus, body:focus, input[readonly]:focus { 
+html:focus, body:focus, input[readonly]:focus {
     outline: none
 }
 
 embed:focus, iframe:focus, object:focus {
     outline: none
 }
-  
+
 input:focus, textarea:focus, keygen:focus, select:focus {
     outline-offset: -2px
 }
@@ -1000,7 +1011,7 @@ input[type="submit" i]:focus,
 input[type="file" i]:focus::-webkit-file-upload-button {
     outline-offset: 0
 }
-    
+
 a:-webkit-any-link {
     color: -webkit-link;
     text-decoration: underline;