DevTools: [Documentation] Add signature section for renderer

Source/devtools/front_end/documentationView.css

 /*
  * 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.
  */
 
 .documentation-example-code {
-    border: 1px dotted black;
+    border: 1px solid gray;
     border-radius: 6px;
     padding: 1em;

[apavlov, 2014/09/05 16:43:00]

In general, we don't use ems in our layout?

[semeny, 2014/09/08 10:03:57]

Done.

     margin-bottom: 1em;
 }
 
 .documentation-code {
-    border: 1px dotted black;
+    border: 1px solid gray;
     border-radius: 6px;
-    padding:1em;
+    padding: 1em;
     margin-bottom: 1em;
 }
 
 .documentation-section-title {
     font-size: 120%;
     padding-bottom: 0.4em;
-    font-weight: bold;
 }
 
 .documentation-link {
     margin-left: 0.5em;
 }
 
 .documentation-highlighted-text {
     font-weight: bold;
 }
 
+.documentation-paragraph {
+    border-top: 4em;
+}
+
+.documentation-method-signature {
+    font-size: 120%;
+    font-family: dejavu sans mono, monospace;

[lushnikov, 2014/09/05 15:20:44]

We never want to tweak font-family property in any style. Please, remove

[semeny, 2014/09/08 10:03:57]

Done.

+    border: 1px solid gray;
+    border-radius: 6px;
+    margin-left: 1em;
+    padding: 1em;
+    display: inline;
+}
+
 .documentation-parameter {
     margin-bottom: 1em;
 }
 
 .documentation-section {
     margin-bottom: 1.5em;
 }
 
+.documentation-section-content {
+    padding-left: 1em;
+}
+
 .documentation-code-tag {
     font-weight: bold;
 }
 
 .documentation-parameter-optional {
-    padding: 0.7ex;
     background-color: rgb(219, 234, 249);
-    text-decoration: none;
+}
+
+.documentation-parameter-data-type-value {
+    background-color: rgb(254, 254, 202);
+    font-family: monospace;

[lushnikov, 2014/09/05 15:20:44]

the font-family property is very tricky. Instead of setting it as "monospace"
here, you'd like to use "monospace" class fro the element

[semeny, 2014/09/08 10:03:57]

Done.

+}
+
+.documentation-parameter-margin {
     margin-left: 1ex;
     margin-top: -0.5ex;
     border-radius: 5px;
-}
-
-.documentation-parameter-data-type-value {
-    margin-right: 0.5em;
-    padding: 0.7ex;
-    background-color: rgb(254, 254, 202);
-    text-decoration: none;
-    margin-left: 1ex;
-    margin-top: -0.5ex;
-    border-radius: 5px;
 }
 
 .documentation-parameter-name {
     font-size: 115%;
     font-style: italic;
 }
 
 .documentation-page-title {
     font-size: 160%;
-    font-weight: bold;
     padding-bottom: 0.7em;
 }
 
 .documentation-view {
     -webkit-user-select: text;
     padding: 1em;
 }
 
 .documentation-example-description-section {
     margin-bottom: 1em;
 }
 
 .documentation-example-link {
     float: right;
-    padding: 0.7ex;
-    background-color: rgb(241, 246, 251);
-    text-decoration: none;
+    background-color: rgb(219, 234, 249);
     margin-left: 1ex;
     margin-top: -0.5ex;
+}
+
+.documentation-example-link:visited {
+    color: rgb(109, 114, 255);
+}
+
+.documentation-color-box {

[lushnikov, 2014/09/05 15:20:44]

The "documentation-color-box" css class doesn't help to understand 
which elements will be styled with this class; instead, it 
describes how they will look, which is not helpful as I can figure 
this out from its properties.

Believe or not, but you don't want to extract common css properties into a
separate class, if they only *happen* to be equal.

[semeny, 2014/09/08 10:03:57]

Done.

+    padding: 0.7ex;
+    padding-left: 1ex;
+    padding-right: 1ex;
     border-radius: 5px;
+    text-decoration: none;
 }
+
+.documentation-text {
+    line-height: 160%;

[lushnikov, 2014/09/05 15:20:44]

i believe you want smth like 1.5 here. We need @eustas to verify our typography
here

[semeny, 2014/09/08 10:03:57]

Done.

+}