[Rietveld] Add support for patchset dependencies

appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html

Index: appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html
diff --git a/appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html b/appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html
index ad4fc964c077ebb2c5b1fcd45a1df0b2f1752f76..e2f713f760e9a0b87e9ac5934301fb9c9e7571e5 100644
--- a/appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html
+++ b/appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html
@@ -64,6 +64,32 @@ found in the LICENSE file. -->
                 </template>
             </div>
         </template>
+        <template if="{{ patchset.dependsOnPatchset }}">
+            <div id="depends-on-patchset">
+                <h2>
+                    Depends on Patchset
+                </h2>
+                <div class="{{ { linethrough: patchset.dependsOnPatchset.issue.closed } | tokenList }}">
+                    <a class="view-depends-on-patchset" href="{{ patchset.dependsOnPatchset | getPatchsetUrl }}" target="_blank">
+                        Issue {{ patchset.dependsOnPatchset.issue.id }} Patch {{ patchset.dependsOnPatchset.id }}
+                    </a>
+                </div>
+            </div>
+        </template>
+        <template if="{{ patchset.dependentPatchsets }}">
+            <div id="dependent-patchsets">
+                <h2>
+                    Dependent Patchsets
+                </h2>
+                <template repeat="{{ dependentPatchset in patchset.dependentPatchsets }}">
+                    <div class="{{ { linethrough: dependentPatchset.issue.closed } | tokenList }}">
+                        <a class="view-dependent-patchsets" href="{{ dependentPatchset | getPatchsetUrl }}" target="_blank">
+                            Issue {{ dependentPatchset.issue.id }} Patch {{ dependentPatchset.id }}
+                        </a>
+                    </div>
+                </template>
+            </div>
+        </template>
         <div id="dialogs"></div>
     </template>
     <script>
@@ -95,6 +121,9 @@ found in the LICENSE file. -->
                     console.log(e);
                 });
             },
+            getPatchsetUrl: function(patchset) {
+                return patchset.getPatchsetUrl();
+            },
             getFiles: function() {
                 // TODO(esprehn): Use an id instead.
                 return this.shadowRoot.querySelectorAll("cr-issue-patchfile").array();