Provide a way to disable WebTestBrowserCheckLayoutSystemDeps

On Windows the function requires system fonts to be "Segoe UI", which is
overly restrictive when we are not interested in layout.

Bug: 1074776
Change-Id: I8ac77928c0049eec67b7f0944872f3b5cc2b96b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2166232Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762721}

content/shell/browser/web_test/web_test_browser_main_platform_support_win.cc

@@ -17,6 +17,7 @@
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/shell/common/shell_switches.h"
 #include "ui/gfx/win/direct_write.h"
 
 namespace content {
@@ -41,6 +42,12 @@ void SetupFonts() {
 }  // namespace
 
 bool WebTestBrowserCheckLayoutSystemDeps() {
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kDisableSystemFontCheck)) {
+    return true;
+  }
+
   std::list<std::string> errors;
 
   // This metric will be 17 when font size is "Normal".

content/shell/common/shell_switches.cc

@@ -14,6 +14,9 @@ const char kContentShellDataPath[] = "data-path";
 // The directory breakpad should store minidumps in.
 const char kCrashDumpsDir[] = "crash-dumps-dir";
 
+// Disables the check for the system font when specified.
+const char kDisableSystemFontCheck[] = "disable-system-font-check";
+
 // Exposes the window.internals object to JavaScript for interactive development
 // and debugging of web tests that rely on it.
 const char kExposeInternalsForTesting[] = "expose-internals-for-testing";

content/shell/common/shell_switches.h

@@ -11,6 +11,7 @@ namespace switches {
 
 extern const char kContentShellDataPath[];
 extern const char kCrashDumpsDir[];
+extern const char kDisableSystemFontCheck[];
 extern const char kExposeInternalsForTesting[];
 extern const char kContentShellHostWindowSize[];
 extern const char kContentShellHideToolbar[];