about:gpu: fix blacklist urls on CrOS, and add "copy to clipboard" button

Makes a few updates to about:gpu.

* Add a "Copy to Clipboard" button, and removes the "To properly save
  this page" instructions. (797440)
* Fixes blacklist URLs on CrOS: fall back to the 0.0.0.0 version
  identifier whenever the 40-char hash is not available. (786605)
* Print the date in ISO format, rather than localized format, so that
  Chrome developers will be able to read it consistently. (no bug)

Bug: 786605
Bug: 797440
Change-Id: I6ab25b19248c49e8ba16bedad5060a48dc16b8b8
Reviewed-on: https://chromium-review.googlesource.com/846283Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526505}

content/browser/resources/gpu/info_view.css

@@ -62,3 +62,7 @@
 #info-view .feature-red {
   color: rgb(255, 0, 0);
 }
+
+#copy-to-clipboard {
+  user-select: none;
+}

content/browser/resources/gpu/info_view.html

@@ -5,12 +5,7 @@ found in the LICENSE file.
 -->
 <tabpanel id="info-view">
   <div>
-    <span>
-      <i>
-        Note: To properly save this page, select the "Webpage, Complete" option
-        in the Save File dialog.
-      </i>
-    </span>
+    <input type="button" id="copy-to-clipboard" value="Copy Report to Clipboard">
   </div>
   <div>
     <h3>Graphics Feature Status</h3>

content/browser/resources/gpu/info_view.js

@@ -27,6 +27,19 @@ cr.define('gpu', function() {
                                      this.refresh.bind(this));
       browserBridge.addEventListener('clientInfoChange',
                                      this.refresh.bind(this));
+
+      // Add handler to 'copy to clipboard' button
+      document.getElementById('copy-to-clipboard').onclick = function() {
+        // Make sure nothing is selected
+        window.getSelection().removeAllRanges();
+
+        document.execCommand('selectAll');
+        document.execCommand('copy');
+
+        // And deselect everything at the end.
+        window.getSelection().removeAllRanges();
+      }
+
       this.refresh();
     },
 
@@ -35,8 +48,12 @@ cr.define('gpu', function() {
     */
     refresh: function(data) {
       function createSourcePermalink(revisionIdentifier, filepath) {
-        return 'https://chromium.googlesource.com/chromium/src/+/' +
-          revisionIdentifier + '/' + filepath;
+        if (revisionIdentifier.length !== 40) {
+          // If the revision id isn't a hash, just use the 0.0.0.0 version
+          // from the Chrome version string "Chrome/0.0.0.0".
+          revisionIdentifier = clientInfo.version.split('/')[1];
+        }
+        return `https://chromium.googlesource.com/chromium/src/+/${revisionIdentifier}/${filepath}`;
       }
 
       // Client info
@@ -46,7 +63,7 @@ cr.define('gpu', function() {
         this.setTable_('client-info', [
           {
             description: 'Data exported',
-            value: (new Date()).toLocaleString()
+            value: (new Date()).toISOString()
           },
           {
             description: 'Chrome version',