mark our unflattened bitmap as immutable (just as picture deserialization does)



git-svn-id: http://skia.googlecode.com/svn/trunk@6736 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkBitmapProcShader.cpp b/src/core/SkBitmapProcShader.cpp
index 6ea55bc..df2caee 100644
--- a/src/core/SkBitmapProcShader.cpp
+++ b/src/core/SkBitmapProcShader.cpp
@@ -35,6 +35,7 @@
 SkBitmapProcShader::SkBitmapProcShader(SkFlattenableReadBuffer& buffer)
         : INHERITED(buffer) {
     buffer.readBitmap(&fRawBitmap);
+    fRawBitmap.setImmutable();
     fState.fTileModeX = buffer.readUInt();
     fState.fTileModeY = buffer.readUInt();
     fFlags = 0; // computed in setContext