[chromedriver] Accept git hashes in blink version strings from devtools

chrome/test/chromedriver/chrome/browser_info.cc

Index: chrome/test/chromedriver/chrome/browser_info.cc
diff --git a/chrome/test/chromedriver/chrome/browser_info.cc b/chrome/test/chromedriver/chrome/browser_info.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e78c1eb279f955b1c90c940fe6ea07d10f45d6b0
--- /dev/null
+++ b/chrome/test/chromedriver/chrome/browser_info.cc
@@ -0,0 +1,120 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/test/chromedriver/chrome/browser_info.h"
+
+#include "base/json/json_reader.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+#include "base/values.h"
+
+BrowserInfo::BrowserInfo()
+    : browser_name(std::string()),
+      browser_version(std::string()),
+      build_no(kToTBuildNo),
+      blink_revision(kToTBlinkRevision) {
+}
+
+BrowserInfo::BrowserInfo(std::string browser_name,
+                         std::string browser_version,
+                         int build_no,
+                         int blink_revision)
+    : browser_name(browser_name),
+      browser_version(browser_version),
+      build_no(build_no),
+      blink_revision(blink_revision) {
+}
+
+Status ParseBrowserInfo(const std::string& data, BrowserInfo* browser_info) {
+  scoped_ptr<base::Value> value(base::JSONReader::Read(data));
+  if (!value.get())
+    return Status(kUnknownError, "version info not in JSON");
+
+  base::DictionaryValue* dict;
+  if (!value->GetAsDictionary(&dict))
+    return Status(kUnknownError, "version info not a dictionary");
+
+  std::string browser;
+  if (!dict->GetString("Browser", &browser)) {
+    return Status(kUnknownError,
+                  "version info doesn't include string 'Browser'");
+  }
+
+  std::string blink_version;
+  if (!dict->GetString("WebKit-Version", &blink_version)) {
+    return Status(kUnknownError,
+                  "version info doesn't include string 'WebKit-Version'");
+  }
+
+  Status status = ParseBrowserString(browser, &browser_info->browser_name,
+      &browser_info->browser_version, &browser_info->build_no);
+
+  if (status.IsError())
+    return status;
+
+  return ParseBlinkVersionString(blink_version, &browser_info->blink_revision);
+}
+
+Status ParseBrowserString(const std::string& browser_string,
+                          std::string* browser_name,
+                          std::string* browser_version,
+                          int* build_no) {
+  if (browser_string.empty()) {
+    *browser_name = "content shell";
+    return Status(kOk);
+  }
+
+  if (browser_string.find("Version/") == 0u) {
+    *browser_name = "webview";
+    return Status(kOk);
+  }
+
+  std::string prefix = "Chrome/";
+  if (browser_string.find(prefix) == 0u) {
+    *browser_name = "chrome";
+    *browser_version = browser_string.substr(prefix.length());
+
+    std::vector<std::string> version_parts;
+    base::SplitString(*browser_version, '.', &version_parts);
+    if (version_parts.size() != 4 ||
+        !base::StringToInt(version_parts[2], build_no)) {
+      return Status(kUnknownError,
+                    "unrecognized Chrome version: " + *browser_version);
+    }
+
+    return Status(kOk);
+  }
+
+  return Status(kUnknownError,
+                "unrecognized Chrome version: " + browser_string);
+}
+
+Status ParseBlinkVersionString(const std::string& blink_version,
+                               int* blink_revision) {
+  size_t before = blink_version.find('@');
+  size_t after = blink_version.find(')');
+  if (before == std::string::npos || after == std::string::npos) {
+    return Status(kUnknownError,
+                  "unrecognized Blink version string: " + blink_version);
+  }
+
+  // Chrome OS reports its Blink revision as a (non-abbreviated) git hash. In
+  // this case, ignore it and don't set |blink_revision|. For Chrome (and for
+  // Chrome OS) we use the build number instead of the blink revision for
+  // decisions about backwards compatibility.
+  std::string revision = blink_version.substr(before + 1, after - before - 1);
+  if (!IsGitHash(revision) && !base::StringToInt(revision, blink_revision)) {
+    return Status(kUnknownError, "unrecognized Blink revision: " + revision);
+  }
+
+  return Status(kOk);
+}
+
+bool IsGitHash(const std::string& revision) {
+  const int kGitHashLength = 40;
+  return revision.size() == kGitHashLength
+      && base::ContainsOnlyChars(revision, "0123456789abcdefABCDEF");
+}