Making WebRTC quality tests less dependent on installed tools.

chrome/browser/media/webrtc_browsertest_common.cc

Index: chrome/browser/media/webrtc_browsertest_common.cc
diff --git a/chrome/browser/media/webrtc_browsertest_common.cc b/chrome/browser/media/webrtc_browsertest_common.cc
index 34d35a7a94a34a47dbe4e6cf2f30b358f20d57af..f30ecf923946ef79701de29348e1d81bb4ba082b 100644
--- a/chrome/browser/media/webrtc_browsertest_common.cc
+++ b/chrome/browser/media/webrtc_browsertest_common.cc
@@ -45,6 +45,24 @@ base::FilePath GetReferenceFilesDir() {
   return test_data_dir.Append(kReferenceFilesDirName);
 }
 
+base::FilePath GetToolForPlatform(const std::string& tool_name) {
+  base::FilePath tools_dir =
+      GetReferenceFilesDir().Append(FILE_PATH_LITERAL("tools"));
+#if defined(OS_WIN)
+  return tools_dir
+      .Append(FILE_PATH_LITERAL("win"))
+      .AppendASCII(tool_name)
+      .AddExtension(FILE_PATH_LITERAL("exe"));
+#elif defined(OS_MACOSX)
+  return tools_dir.Append(FILE_PATH_LITERAL("mac")).AppendASCII(tool_name);
+#elif defined(OS_LINUX)
+  return tools_dir.Append(FILE_PATH_LITERAL("linux")).AppendASCII(tool_name);
+#else
+  CHECK(false) << "Can't retrieve tool " << tool_name << " on this platform.";
+  return base::FilePath();
+#endif
+}
+
 bool HasReferenceFilesInCheckout() {
   if (!base::PathExists(GetReferenceFilesDir())) {
     LOG(ERROR)