Make reftests work for sky.

sky/tools/tester/tester.cc

Index: sky/tools/tester/tester.cc
diff --git a/sky/tools/tester/tester.cc b/sky/tools/tester/tester.cc
index 19f0db8362844e2039593c88183b57a3274debc8..3c94b47281de6267778115982c90b26fe9e84405 100644
--- a/sky/tools/tester/tester.cc
+++ b/sky/tools/tester/tester.cc
@@ -23,10 +23,32 @@ namespace sky {
 namespace tester {
 namespace {
 
-std::string WaitForURL() {
-  std::string url;
-  std::cin >> url;
-  return url;
+std::string WaitForURL(bool* enable_pixel_dumping,

[ojan, 2014/12/12 03:48:39]

This code is cargo-culted from
https://code.google.com/p/chromium/codesearch#chromium/src/content/shell/brow...

+                       std::string* expected_pixel_hash) {
+  // A test name is formated like file:///path/to/test'--pixel-test'pixelhash
+  std::string test_name;
+  std::cin >> test_name;
+
+  std::string pixel_switch;
+  std::string::size_type separator_position = test_name.find('\'');
+  if (separator_position != std::string::npos) {
+    pixel_switch = test_name.substr(separator_position + 1);
+    test_name.erase(separator_position);
+  }
+
+  std::string pixel_hash;
+  separator_position = pixel_switch.find('\'');
+  if (separator_position != std::string::npos) {
+    pixel_hash = pixel_switch.substr(separator_position + 1);
+    pixel_switch.erase(separator_position);
+  }
+
+  if (enable_pixel_dumping)
+    *enable_pixel_dumping = pixel_switch == "--pixel-test";
+  if (expected_pixel_hash)
+    *expected_pixel_hash = pixel_hash;
+
+  return test_name;
 }
 
 }  // namespace
@@ -110,8 +132,12 @@ class SkyTester : public mojo::ApplicationDelegate,
 
   void Run() {
     DCHECK(!test_runner_);
-    std::string url = url_from_args_.length() ? url_from_args_ : WaitForURL();
-    test_runner_.reset(new TestRunner(this, content_, url));
+
+    bool enable_pixel_dumping = false;
+    std::string expected_pixel_hash;

[ojan, 2014/12/12 03:48:39]

This is unused at the moment, but we will need it when we enable regular pixel
tests.

+
+    std::string url = url_from_args_.length() ? url_from_args_ : WaitForURL(&enable_pixel_dumping, &expected_pixel_hash);
+    test_runner_.reset(new TestRunner(this, content_, url, enable_pixel_dumping));
   }
 
   void OnTestComplete() override {