[Mac] Check for colour constants that do not specify a colourspace.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 72aa2484806a446c78d142089b436148c76ae705..f43916a6d208c4505b63e88d26d534116601fb5a 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -143,6 +143,28 @@ _BANNED_OBJC_FUNCTIONS = (
       ),
       True,
     ),
+    (
+      # This is a C++ function, but it returns an NSObject so is only likely
+      # to appear in .mm files.
+      'SkColorToCalibratedNSColor',
+      (
+       '"Calibrated" colors are probably not what you want. Consider using',
+       'SkColorToSRGBNSColor instead of SkColorToCalibratedNSColor.',
+       'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
+      ),
+      False,
+    ),
+    (
+      # Catch all of [NSColor colorWithCalibrated(Hue|Red|White).*.
+      'colorWithCalibrated',
+      (
+       '"Calibrated" colors are probably not what you want. Consider using',
+       'the +[NSColor colorWithSRGBRed:green:blue:alpha: or the ',
+       '+[NSColor colorWithGenericGamma22White:alpha: method.',
+       'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
+      ),
+      False,
+    ),
 )