Do not kill renderer when enumerateDevices is called from about:blank.

content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc

Index: content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc
diff --git a/content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc b/content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc
index a050760cc58304f5b8dbaac7b6423bb42a47425c..1b0b18053ce89ce39751fa960fbb1b38d545f3f2 100644
--- a/content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc
+++ b/content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc
@@ -103,6 +103,11 @@ class MediaDevicesDispatcherHostTest : public testing::Test {
     ASSERT_GT(physical_devices_[MEDIA_DEVICE_TYPE_AUDIO_OUTPUT].size(), 0u);
   }
 
+  MOCK_METHOD1(UniqueOriginCallback,
+               void(const std::vector<std::vector<MediaDeviceInfo>>&));
+  MOCK_METHOD1(ValidOriginCallback,
+               void(const std::vector<std::vector<MediaDeviceInfo>>&));
+
  protected:
   void DevicesEnumerated(
       const base::Closure& closure,
@@ -307,4 +312,21 @@ TEST_F(MediaDevicesDispatcherHostTest, SubscribeDeviceChangeNoAccess) {
   SubscribeAndWaitForResult(false);
 }
 
+TEST_F(MediaDevicesDispatcherHostTest, EnumerateAllDevicesUniqueOrigin) {
+  EXPECT_CALL(*this, UniqueOriginCallback(testing::_)).Times(0);
+  host_->EnumerateDevices(
+      true, true, true, url::Origin(),
+      base::Bind(&MediaDevicesDispatcherHostTest::UniqueOriginCallback,
+                 base::Unretained(this)));
+  base::RunLoop().RunUntilIdle();
+
+  // Verify that the callback for a valid origin does get called.
+  EXPECT_CALL(*this, ValidOriginCallback(testing::_));
+  host_->EnumerateDevices(
+      true, true, true, url::Origin(GURL("http://localhost")),
+      base::Bind(&MediaDevicesDispatcherHostTest::ValidOriginCallback,
+                 base::Unretained(this)));
+  base::RunLoop().RunUntilIdle();
+}
+
 };  // namespace content