Adds QueryResultManager support class for Media Router Dialog WebUI

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index f0a939ead26105a7df6c9cb53eaedc4f2bc36797..0b9655154b5713d79c3640ff8b1d56d4ce598bd7 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -212,6 +212,16 @@ source_set("test_support_unit") {
     "//mojo/environment:chromium",
     "//third_party/mojo/src/mojo/edk/system",
   ]
+  if (enable_media_router) {
+    sources += [
+      "../browser/media/router/mock_media_router.cc",

[sky, 2015/05/07 23:14:30]

Why do these need to be here and not closer to where you're using it?

[mark a. foltz, 2015/05/08 00:13:16]

I have another patch which will move these to
chrome/browser/media/router/BUILD.gn.  Once that lands I'll update this issue,
your review might no longer be necessary :)

https://codereview.chromium.org/1136623003/

+      "../browser/media/router/mock_media_router.h",
+    ]
+    deps += [
+      "../browser/media/router:router_core",
+      "//testing/gmock",
+    ]
+  }
 }
 
 if (!is_android) {