Fix the chrome.runtime.onInstalled docs to note it fires for updates as well.

BUG=134319


Review URL: https://chromiumcodereview.appspot.com/10833070

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148956 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/api/runtime.json

@@ -112,7 +112,7 @@
       {
         "name": "onInstalled",
         "type": "function",
-        "description": "Fired when the extension is first installed."
+        "description": "Fired when the extension is first installed, and on each update to a new version."
       },
       {
         "name": "onSuspend",

chrome/common/extensions/docs/apps/runtime.html

@@ -489,7 +489,7 @@
                 <span class="subdued">chrome.runtime.</span><span>onInstalled</span><span class="subdued">.addListener</span>(function(<span></span>) <span class="subdued">{...}</span><span></span>);
               </div>
               <div class="description">
-                <p>Fired when the extension is first installed.</p>
+                <p>Fired when the extension is first installed, and on each update to a new version.</p>
                 <!-- LISTENER PARAMETERS -->
                 <!-- EXTRA PARAMETERS -->
                 <!-- LISTENER RETURN VALUE -->

chrome/common/extensions/docs/extensions/runtime.html

@@ -556,7 +556,7 @@
                 <span class="subdued">chrome.runtime.</span><span>onInstalled</span><span class="subdued">.addListener</span>(function(<span></span>) <span class="subdued">{...}</span><span></span>);
               </div>
               <div class="description">
-                <p>Fired when the extension is first installed.</p>
+                <p>Fired when the extension is first installed, and on each update to a new version.</p>
                 <!-- LISTENER PARAMETERS -->
                 <!-- EXTRA PARAMETERS -->
                 <!-- LISTENER RETURN VALUE -->