Revert[4] of add asserts around results from requestLock

src/core/SkBitmap.cpp

Index: src/core/SkBitmap.cpp
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index 563fc2875c41221e1cacec39d108febd1f084377..36e31f56e5b82c0af671164c9bd614d09285f6d6 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -344,6 +344,9 @@ bool SkBitmap::installPixels(const SkImageInfo& requestedInfo, void* pixels, siz
         this->reset();
         return false;
     }
+    if (NULL == pixels) {
+        return true;    // we behaved as if they called setInfo()
+    }
 
     // setInfo may have corrected info (e.g. 565 is always opaque).
     const SkImageInfo& correctedInfo = this->info();