Use a utility process for the Mojo v8 proxy resolver.

chrome/browser/net/proxy_browsertest.cc

Index: chrome/browser/net/proxy_browsertest.cc
diff --git a/chrome/browser/net/proxy_browsertest.cc b/chrome/browser/net/proxy_browsertest.cc
index d705a09521d02f77178932bfa8e7622be2042366..e77724998e391ddfc0ddaed560d7f789a8f26d3b 100644
--- a/chrome/browser/net/proxy_browsertest.cc
+++ b/chrome/browser/net/proxy_browsertest.cc
@@ -249,4 +249,30 @@ IN_PROC_BROWSER_TEST_F(DataProxyScriptBrowserTest, Verify) {
   VerifyProxyScript(browser());
 }
 
+// Fetch PAC script via a data: URL and run out-of-process using Mojo.
+class OutOfProcessProxyResolverBrowserTest : public InProcessBrowserTest {
+ public:
+  OutOfProcessProxyResolverBrowserTest() {}
+  ~OutOfProcessProxyResolverBrowserTest() override {}
+
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    std::string contents;
+    // Read in kPACScript contents.
+    ASSERT_TRUE(base::ReadFileToString(ui_test_utils::GetTestFilePath(
+        base::FilePath(base::FilePath::kCurrentDirectory),
+        base::FilePath(kPACScript)),
+        &contents));
+    command_line->AppendSwitchASCII(
+        switches::kProxyPacUrl, "data:," + contents);
+    command_line->AppendSwitch(switches::kV8PacMojoOutOfProcess);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(OutOfProcessProxyResolverBrowserTest);
+};
+
+IN_PROC_BROWSER_TEST_F(OutOfProcessProxyResolverBrowserTest, Verify) {
+  VerifyProxyScript(browser());
+}
+
 }  // namespace