Move RasterDeviceTooBigToAllocate to caller

skia/ext/bitmap_platform_device_mac.cc

Index: skia/ext/bitmap_platform_device_mac.cc
diff --git a/skia/ext/bitmap_platform_device_mac.cc b/skia/ext/bitmap_platform_device_mac.cc
index e2b2c02a5f3664230aa02bf3bf1867d09e2486fe..d46efddf408d3585330b7a20a2dc5fa53318bf74 100644
--- a/skia/ext/bitmap_platform_device_mac.cc
+++ b/skia/ext/bitmap_platform_device_mac.cc
@@ -23,6 +23,19 @@ namespace skia {
 
 namespace {
 
+// Returns true if it is unsafe to attempt to allocate an offscreen buffer
+// given these dimensions.
+bool RasterDeviceTooBigToAllocate(int width, int height) {
+
+#ifndef SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX
+#define SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX    (2 * 256 * 1024 * 1024)
+#endif
+
+    int bytesPerPixel = 4;
+    int64_t bytes = (int64_t)width * height * bytesPerPixel;
+    return bytes > SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX;
+}
+
 static CGContextRef CGContextForData(void* data, int width, int height) {
 #define HAS_ARGB_SHIFTS(a, r, g, b) \
             (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \