make allocPixels throw on failure

src/effects/SkMorphologyImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMorphologyImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 148 matching lines @@
     SkIRect bounds;
     if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
         return false;
     }
 
     SkAutoLockPixels alp(src);
     if (!src.getPixels()) {
         return false;
     }
 
-    if (!dst->allocPixels(src.info().makeWH(bounds.width(), bounds.height()))) {
+    if (!dst->tryAllocPixels(src.info().makeWH(bounds.width(), bounds.height()))) {
         return false;
     }
 
     SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                      SkIntToScalar(this->radius().height()));
     ctx.ctm().mapVectors(&radius, 1);
     int width = SkScalarFloorToInt(radius.fX);
     int height = SkScalarFloorToInt(radius.fY);
 
     if (width < 0 || height < 0) {
         return false;
     }
 
     SkIRect srcBounds = bounds;
     srcBounds.offset(-srcOffset);
 
     if (width == 0 && height == 0) {
         src.extractSubset(dst, srcBounds);
         offset->fX = bounds.left();
         offset->fY = bounds.top();
         return true;
     }
 
     SkBitmap temp;
-    if (!temp.allocPixels(dst->info())) {
+    if (!temp.tryAllocPixels(dst->info())) {
         return false;
     }
 
     if (width > 0 && height > 0) {
         callProcX(procX, src, &temp, width, srcBounds);
         SkIRect tmpBounds = SkIRect::MakeWH(srcBounds.width(), srcBounds.height());
         callProcY(procY, temp, dst, height, tmpBounds);
     } else if (width > 0) {
         callProcX(procX, src, dst, width, srcBounds);
     } else if (height > 0) {
@@ skipping 396 matching lines @@
                                          SkBitmap* result, SkIPoint* offset) const {
     return this->filterImageGPUGeneric(true, proxy, src, ctx, result, offset);
 }
 
 bool SkErodeImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                         SkBitmap* result, SkIPoint* offset) const {
     return this->filterImageGPUGeneric(false, proxy, src, ctx, result, offset);
 }
 
 #endif