Image filters: Replace all use of tryAllocPixels() with createDevice().

src/effects/SkMatrixConvolutionImageFilter.cpp

Index: src/effects/SkMatrixConvolutionImageFilter.cpp
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index 67813fd25910ac4f4ef1204cf91345cf6d94f9ca..e58eec10f4e25d99c2fff2a262b232ea9bbda72b 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -8,6 +8,7 @@
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
+#include "SkDevice.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkRect.h"
@@ -241,16 +242,18 @@ void SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src,
 // FIXME:  This should be refactored to SkImageFilterUtils for
 // use by other filters.  For now, we assume the input is always
 // premultiplied and unpremultiply it
-static SkBitmap unpremultiplyBitmap(const SkBitmap& src)
+static SkBitmap unpremultiplyBitmap(SkImageFilter::Proxy* proxy, const SkBitmap& src)
 {
     SkAutoLockPixels alp(src);
     if (!src.getPixels()) {
         return SkBitmap();
     }
-    SkBitmap result;
-    if (!result.tryAllocPixels(src.info())) {
+    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(src.width(), src.height()));
+    if (!device) {
         return SkBitmap();
     }
+    SkBitmap result = device->accessBitmap(false);
+    SkAutoLockPixels alp_result(result);
     for (int y = 0; y < src.height(); ++y) {
         const uint32_t* srcRow = src.getAddr32(0, y);
         uint32_t* dstRow = result.getAddr32(0, y);
@@ -282,7 +285,7 @@ bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy,
     }
 
     if (!fConvolveAlpha && !src.isOpaque()) {
-        src = unpremultiplyBitmap(src);
+        src = unpremultiplyBitmap(proxy, src);
     }
 
     SkAutoLockPixels alp(src);
@@ -290,9 +293,12 @@ bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy,
         return false;
     }
 
-    if (!result->tryAllocPixels(src.info().makeWH(bounds.width(), bounds.height()))) {
+    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
+    if (!device) {
         return false;
     }
+    *result = device->accessBitmap(false);
+    SkAutoLockPixels alp_result(*result);
 
     offset->fX = bounds.fLeft;
     offset->fY = bounds.fTop;