Implement support for non-scale/translate CTM in image filters.

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index e7dac5e145f726cd35a92b8a966cf46ea5e6088f..ac01fad6b20207c00add53d96d30171f8e0ae50e 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1261,7 +1261,7 @@ private:
     enum {
         kMCRecSize      = 128,  // most recent measurement
         kMCRecCount     = 8,    // common depth for save/restores
-        kDeviceCMSize   = 136,  // most recent measurement
+        kDeviceCMSize   = 176,  // most recent measurement
     };
     intptr_t fMCRecStorage[kMCRecSize * kMCRecCount / sizeof(intptr_t)];
     intptr_t fDeviceCMStorage[kDeviceCMSize / sizeof(intptr_t)];
@@ -1285,6 +1285,7 @@ private:
 
     void doSave();
     void checkForDeferredSave();
+    void internalSetMatrix(const SkMatrix& matrix);
 
     friend class SkDrawIter;        // needs setupDrawForLayerDevice()
     friend class AutoDrawLooper;