use tryAllocPixels to check the result, allocPixels to require success

Source/platform/graphics/GraphicsContext.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 780 matching lines @@
     int index = style == DocumentMarkerGrammarLineStyle ? 1 : 0;
     static SkBitmap* misspellBitmap1x[2] = { 0, 0 };
     static SkBitmap* misspellBitmap2x[2] = { 0, 0 };
     SkBitmap** misspellBitmap = deviceScaleFactor == 2 ? misspellBitmap2x : misspellBitmap1x;
     if (!misspellBitmap[index]) {
 #if OS(MACOSX)
         // Match the artwork used by the Mac.
         const int rowPixels = 4 * deviceScaleFactor;
         const int colPixels = 3 * deviceScaleFactor;
         SkBitmap bitmap;
-        if (!bitmap.allocN32Pixels(rowPixels, colPixels))
+        if (!bitmap.tryAllocN32Pixels(rowPixels, colPixels))
             return;
 
         bitmap.eraseARGB(0, 0, 0, 0);
         const uint32_t transparentColor = 0x00000000;
 
         if (deviceScaleFactor == 1) {
             const uint32_t colors[2][6] = {
                 { 0x2a2a0600, 0x57571000,  0xa8a81b00, 0xbfbf1f00,  0x70701200, 0xe0e02400 },
                 { 0x2a0f0f0f, 0x571e1e1e,  0xa83d3d3d, 0xbf454545,  0x70282828, 0xe0515151 }
             };
@@ skipping 37 matching lines @@
             ASSERT_NOT_REACHED();
 
         misspellBitmap[index] = new SkBitmap(bitmap);
 #else
         // We use a 2-pixel-high misspelling indicator because that seems to be
         // what WebKit is designed for, and how much room there is in a typical
         // page for it.
         const int rowPixels = 32 * deviceScaleFactor; // Must be multiple of 4 for pattern below.
         const int colPixels = 2 * deviceScaleFactor;
         SkBitmap bitmap;
-        if (!bitmap.allocN32Pixels(rowPixels, colPixels))
+        if (!bitmap.tryAllocN32Pixels(rowPixels, colPixels))
             return;
 
         bitmap.eraseARGB(0, 0, 0, 0);
         if (deviceScaleFactor == 1)
             draw1xMarker(&bitmap, index);
         else if (deviceScaleFactor == 2)
             draw2xMarker(&bitmap, index);
         else
             ASSERT_NOT_REACHED();
 
@@ skipping 1091 matching lines @@
         // FIXME: This is to not break tests (it results in the filter bitmap flag
         // being set to true). We need to decide if we respect InterpolationNone
         // being returned from computeInterpolationQuality.
         resampling = InterpolationLow;
     }
     resampling = limitInterpolationQuality(this, resampling);
     paint->setFilterLevel(static_cast<SkPaint::FilterLevel>(resampling));
 }
 
 } // namespace blink