Merge 94982 - [chromium] Prevent a crash when tearing down an ImageBuffer that was not successfu...

Source/WebCore/platform/graphics/skia/ImageBufferSkia.cpp

Index: Source/WebCore/platform/graphics/skia/ImageBufferSkia.cpp
===================================================================
--- Source/WebCore/platform/graphics/skia/ImageBufferSkia.cpp	(revision 95123)
+++ Source/WebCore/platform/graphics/skia/ImageBufferSkia.cpp	(working copy)
@@ -116,8 +116,10 @@
 
 ImageBuffer::~ImageBuffer()
 {
-    // This is so that the SkGpuDevice destructor has the correct context.
-    m_context->platformContext()->makeGrContextCurrent();
+    if (m_context && m_context->platformContext()) {
+        // This is so that the SkGpuDevice destructor has the correct context.
+        m_context->platformContext()->makeGrContextCurrent();
+    }
 }
 
 GraphicsContext* ImageBuffer::context() const