Fix a minor bug in compressedTex{Sub}Image in blink.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
index 7f0237550d6fe1a8e62abe9492834d8600182d88..925955027403e515b051b401ae221e564600ef06 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
@@ -2010,6 +2010,7 @@ void WebGL2RenderingContextBase::compressedTexImage2D(
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage2D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexImage2D(
       target, level, internalformat, width, height, border, srcLengthOverride,
@@ -2056,6 +2057,7 @@ void WebGL2RenderingContextBase::compressedTexSubImage2D(
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage2D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexSubImage2D(
       target, level, xoffset, yoffset, width, height, format, srcLengthOverride,
@@ -2089,6 +2091,7 @@ void WebGL2RenderingContextBase::compressedTexImage3D(
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage3D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexImage3D(
       target, level, internalformat, width, height, depth, border,
@@ -2125,6 +2128,7 @@ void WebGL2RenderingContextBase::compressedTexSubImage3D(
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexSubImage3D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexSubImage3D(
       target, level, xoffset, yoffset, zoffset, width, height, depth, format,