Prevent Null input in texSubImage2D(3D)

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index fb622a1592c3a19a6608e8f9d254a72977d142b9..9d393eeb3048eec2d482bb1aad0eae79bcfac2db 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -4123,8 +4123,14 @@ void WebGLRenderingContextBase::texImageHelperDOMArrayBufferView(TexImageFunctio
         sourceType = Tex2D;
     else
         sourceType = Tex3D;
-    if (!validateTexFuncData(funcName, sourceType, level, width, height, depth, format, type, pixels, NullAllowed))
-        return;
+    switch (functionType) {
+    case TexImage:
+        if (!validateTexFuncData(funcName, sourceType, level, width, height, depth, format, type, pixels, NullAllowed))
+            return;
+    case TexSubImage:
+        if (!validateTexFuncData(funcName, sourceType, level, width, height, depth, format, type, pixels, NullNotAllowed))
+            return;

[Ken Russell (switch to Gerrit), 2016/06/09 05:31:24]

As you've seen the bots failed to compile this because there are enums which
aren't these two. Please figure out how they should be handled without adding a
default: label -- perhaps using NOTREACHED().

+    }
     void* data = pixels ? pixels->baseAddress() : 0;
     Vector<uint8_t> tempData;
     bool changeUnpackAlignment = false;