Fix spelling mistakes in //docs.

docs/chrome_settings.md

 # What is chrome://settings?
 
 Chrome (version 10 and above) uses WebUI settings by default for all platforms.
 Access it via the wrench menu ("Preferences" on Mac and Linux; "Options" on
 Windows and ChromeOS), or by typing chrome://settings into the address bar.
 
 One advantage of chrome://settings over platform-native dialogs is that it is
 shared by all platforms; therefore, it is easier to add new options UI and to
 keep all platforms in sync.
 
@@ skipping 60 matching lines @@
 
 Add the string to `chrome/app/generated_resources.grd` near related strings. No
 trailing punctuation; sentence case.
 
 ### 3. Changing WebUI Handler
 
 For simple prefs, the UI is kept in sync with the value automagically (see
 `CoreOptionsHandler`). Find the handler most closely relevant to your pref. The
 only action we need take here is to make the page aware of the new string.
 Locate the method in the handler called `GetLocalizedStrings` and look at its
-body for examples of `SetString` usage. The first parameter is the javascript
+body for examples of `SetString` usage. The first parameter is the JavaScript
 name for the string.
 
 ### 4. HTML/CSS/JS
 
 An example of the form a checkbox should take in html:
 
 ```html
 <label class="checkbox">
   <input id="clear-cookies-on-exit"
        pref="profile.clear_site_data_on_exit" type="checkbox">
   <span i18n-content="clearCookiesOnExit"></span>
 </label>
 ```
 
 Of note:
 
 *   the `checkbox` class allows us to style all checkboxes the same via CSS
 *   the class and ID are in dash-form * the i18n-content value is in camelCase
 *   the pref attribute matches that which is defined in
     `chrome/common/pref_names.cc` and allows the prefs framework to
     automatically keep it in sync with the value in C++
 *   the `i18n-content` value matches the string we defined in the WebUI handler.
     The `textContent` of the `span` will automatically be set to the associated
     text.
 
 In this example, no additional JS or CSS are needed.