Add support for gcm_sender_id in Manifest.

content/renderer/manifest/manifest_parser_unittest.cc

Index: content/renderer/manifest/manifest_parser_unittest.cc
diff --git a/content/renderer/manifest/manifest_parser_unittest.cc b/content/renderer/manifest/manifest_parser_unittest.cc
index 32730f760ba9da402408f5f11212a41a7eb6df84..72127560a3e0fbee7c1e8098f8abaa05e3aab5b6 100644
--- a/content/renderer/manifest/manifest_parser_unittest.cc
+++ b/content/renderer/manifest/manifest_parser_unittest.cc
@@ -580,4 +580,28 @@ TEST_F(ManifestParserTest, IconSizesParseRules) {
   }
 }
 
+TEST_F(ManifestParserTest, GCMSenderIDParseRules) {
+  // Smoke test.
+  {
+    Manifest manifest = ParseManifest("{ \"gcm_sender_id\": \"foo\" }");
+    EXPECT_TRUE(EqualsASCII(manifest.gcm_sender_id.string(), "foo"));
+  }
+
+  // Trim whitespaces.
+  {
+    Manifest manifest = ParseManifest("{ \"gcm_sender_id\": \"  foo  \" }");
+    EXPECT_TRUE(EqualsASCII(manifest.gcm_sender_id.string(), "foo"));
+  }
+
+  // Don't parse if property isn't a string.
+  {
+    Manifest manifest = ParseManifest("{ \"gcm_sender_id\": {} }");
+    EXPECT_TRUE(manifest.gcm_sender_id.is_null());
+  }
+  {
+    Manifest manifest = ParseManifest("{ \"gcm_sender_id\": 42 }");
+    EXPECT_TRUE(manifest.gcm_sender_id.is_null());
+  }
+}
+
 } // namespace content