gm: report ExpectationsMismatch and RenderModeMismatch results separately

gm/gm_error.h

Index: gm/gm_error.h
===================================================================
--- gm/gm_error.h	(revision 8534)
+++ gm/gm_error.h	(working copy)
@@ -26,7 +26,8 @@
         // or off (as long as the number of these errors is 0).
         kNoGpuContext_ErrorType,
 
-        kImageMismatch_ErrorType,
+        kRenderModeMismatch_ErrorType,

[epoger, 2013/04/04 16:55:57]

patchset 3 adds a new kRenderModeMismatch_ErrorType.  It's not triggered
anywhere yet, but I had to update the expected self-test results for all of the
"RenderModeMismatch=0" reports.

+        kExpectationsMismatch_ErrorType,
         kMissingExpectations_ErrorType,
         kWritingReferenceImage_ErrorType,
         kLast_ErrorType = kWritingReferenceImage_ErrorType
@@ -39,8 +40,10 @@
         switch(type) {
         case kNoGpuContext_ErrorType:
             return "NoGpuContext";
-        case kImageMismatch_ErrorType:
-            return "ImageMismatch";
+        case kRenderModeMismatch_ErrorType:
+            return "RenderModeMismatch";
+        case kExpectationsMismatch_ErrorType:
+            return "ExpectationsMismatch";
         case kMissingExpectations_ErrorType:
             return "MissingExpectations";
         case kWritingReferenceImage_ErrorType: