color: Add --force-color-profile command line flag

content/shell/app/shell_main_delegate.cc

Index: content/shell/app/shell_main_delegate.cc
diff --git a/content/shell/app/shell_main_delegate.cc b/content/shell/app/shell_main_delegate.cc
index a723a39d2fa5ef9e1be18a01feb6d1be533ae362..eaa5e07d3551f9eb1fd01f467b8e39a93f3e251a 100644
--- a/content/shell/app/shell_main_delegate.cc
+++ b/content/shell/app/shell_main_delegate.cc
@@ -42,6 +42,7 @@
 #include "ui/base/ui_base_paths.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/display/display_switches.h"
+#include "ui/gfx/switches.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
 
@@ -212,8 +213,20 @@ bool ShellMainDelegate::BasicStartupComplete(int* exit_code) {
       command_line.AppendSwitch(switches::kDisableGpuRasterization);
     }
 
-    // Unless/until WebM files are added to the media layout tests, we need to
-    // avoid removing MP4/H264/AAC so that layout tests can run on Android.
+    // If the virtual test suite didn't specify a color space, then use the
+    // default layout test color space (GenericRGB for Mac and sRGB for all
+    // other platforms).
+    if (!command_line.HasSwitch(switches::kForceColorProfile)) {
+#if defined(OS_MACOSX)
+      command_line.AppendSwitchASCII(switches::kForceColorProfile,
+                                     "generic-rgb");
+#else
+      command_line.AppendSwitchASCII(switches::kForceColorProfile, "srgb");
+#endif
+    }
+
+// Unless/until WebM files are added to the media layout tests, we need to
+// avoid removing MP4/H264/AAC so that layout tests can run on Android.
 #if !defined(OS_ANDROID)
     media::RemoveProprietaryMediaTypesAndCodecsForTests();
 #endif