Rename SkGifCodec, SkIcoCodec, SkWbmpCodec

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1567863003

Review URL: https://codereview.chromium.org/1567863003
diff --git a/gyp/codec.gyp b/gyp/codec.gyp
index 109c216..e88e6dc 100644
--- a/gyp/codec.gyp
+++ b/gyp/codec.gyp
@@ -40,10 +40,9 @@
         '../src/codec/SkBmpRLECodec.cpp',
         '../src/codec/SkBmpStandardCodec.cpp',
         '../src/codec/SkCodec.cpp',
-        '../src/codec/SkCodec_libgif.cpp',
-        '../src/codec/SkCodec_libico.cpp',
         '../src/codec/SkCodec_libpng.cpp',
-        '../src/codec/SkCodec_wbmp.cpp',
+        '../src/codec/SkGifCodec.cpp',
+        '../src/codec/SkIcoCodec.cpp',
         '../src/codec/SkJpegCodec.cpp',
         '../src/codec/SkJpegDecoderMgr.cpp',
         '../src/codec/SkJpegUtility_codec.cpp',
@@ -52,6 +51,7 @@
         '../src/codec/SkSampler.cpp',
         '../src/codec/SkSampledCodec.cpp',
         '../src/codec/SkSwizzler.cpp',
+        '../src/codec/SkWbmpCodec.cpp',
         '../src/codec/SkWebpAdapterCodec.cpp',
         '../src/codec/SkWebpCodec.cpp',
       ],
diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index 0736f2a..f1e69be 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -7,16 +7,16 @@
 
 #include "SkBmpCodec.h"
 #include "SkCodec.h"
-#include "SkData.h"
-#include "SkCodec_libgif.h"
-#include "SkCodec_libico.h"
 #include "SkCodec_libpng.h"
-#include "SkCodec_wbmp.h"
 #include "SkCodecPriv.h"
+#include "SkData.h"
+#include "SkGifCodec.h"
+#include "SkIcoCodec.h"
 #if !defined(GOOGLE3)
 #include "SkJpegCodec.h"
 #endif
 #include "SkStream.h"
+#include "SkWbmpCodec.h"
 #include "SkWebpCodec.h"
 
 struct DecoderProc {
diff --git a/src/codec/SkCodec_libgif.cpp b/src/codec/SkGifCodec.cpp
similarity index 99%
rename from src/codec/SkCodec_libgif.cpp
rename to src/codec/SkGifCodec.cpp
index 40ed94d..92470bf 100644
--- a/src/codec/SkCodec_libgif.cpp
+++ b/src/codec/SkGifCodec.cpp
@@ -5,10 +5,10 @@
  * found in the LICENSE file.
  */
 
-#include "SkCodec_libgif.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
+#include "SkGifCodec.h"
 #include "SkStream.h"
 #include "SkSwizzler.h"
 #include "SkUtils.h"
diff --git a/src/codec/SkCodec_libgif.h b/src/codec/SkGifCodec.h
similarity index 100%
rename from src/codec/SkCodec_libgif.h
rename to src/codec/SkGifCodec.h
diff --git a/src/codec/SkCodec_libico.cpp b/src/codec/SkIcoCodec.cpp
similarity index 99%
rename from src/codec/SkCodec_libico.cpp
rename to src/codec/SkIcoCodec.cpp
index 660576a..0280be3 100644
--- a/src/codec/SkCodec_libico.cpp
+++ b/src/codec/SkIcoCodec.cpp
@@ -6,11 +6,11 @@
  */
 
 #include "SkBmpCodec.h"
-#include "SkCodec_libico.h"
 #include "SkCodec_libpng.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
 #include "SkData.h"
+#include "SkIcoCodec.h"
 #include "SkStream.h"
 #include "SkTDArray.h"
 #include "SkTSort.h"
diff --git a/src/codec/SkCodec_libico.h b/src/codec/SkIcoCodec.h
similarity index 100%
rename from src/codec/SkCodec_libico.h
rename to src/codec/SkIcoCodec.h
diff --git a/src/codec/SkCodec_wbmp.cpp b/src/codec/SkWbmpCodec.cpp
similarity index 99%
rename from src/codec/SkCodec_wbmp.cpp
rename to src/codec/SkWbmpCodec.cpp
index d734ad3..4dd0f25 100644
--- a/src/codec/SkCodec_wbmp.cpp
+++ b/src/codec/SkWbmpCodec.cpp
@@ -11,7 +11,7 @@
 #include "SkColorTable.h"
 #include "SkData.h"
 #include "SkStream.h"
-#include "SkCodec_wbmp.h"
+#include "SkWbmpCodec.h"
 
 // Each bit represents a pixel, so width is actually a number of bits.
 // A row will always be stored in bytes, so we round width up to the
diff --git a/src/codec/SkCodec_wbmp.h b/src/codec/SkWbmpCodec.h
similarity index 100%
rename from src/codec/SkCodec_wbmp.h
rename to src/codec/SkWbmpCodec.h