SkRRect.h: make kUnknown_Type part of the Type enum.

SkRRect.h: make kUnknown_Type part of the Type enum.

This fixes the following warnings from a recent Clang version (and also the
build error in SkRRect.cpp):

  third_party/skia/include/core/SkRRect.h:86:27: error: comparison of constant -1 with expression of type 'SkRRect::Type' is always false [-Werror,-Wtautological-constant-out-of-range-compare]
          if (kUnknown_Type == fType) {
              ~~~~~~~~~~~~~ ^  ~~~~~

  third_party/skia/include/core/SkRRect.h:89:32: error: comparison of constant -1 with expression of type 'SkRRect::Type' is always true [-Werror,-Wtautological-constant-out-of-range-compare]
          SkASSERT(kUnknown_Type != fType);
                   ~~~~~~~~~~~~~ ^  ~~~~~
  ../../third_party/skia/include/core/SkTypes.h:95:55: note: expanded from macro 'SkASSERT'
      #define SkASSERT(cond)              SK_DEBUGBREAK(cond)
                                                        ^
  ../../skia/config/SkUserConfig.h:180:40: note: expanded from macro 'SK_DEBUGBREAK'
  #define SK_DEBUGBREAK(cond) do { if (!(cond)) { \
                                         ^

BUG=crbug.com/163104

[hans, 2012-12-03 11:20:22]

On 2012/12/03 11:20:06, hans wrote:

gah, and it didn't upload all the files

[TomH, 2012-12-03 11:26:34]

LGTM
TBR=robertphillips

(Changed to Rob's primary account.)

[TomH, 2012-12-03 11:42:27]

Committed as r6641.
It passed unit tests. I got some weird failures on GM which I can't believe were
related, but my GM setup is hinky, so I'm assuming it's tester error.
Please close this (+alternate approach in 6863051/) when you have a moment.