Initial work to get ETC1 data up to the GPU

src/gpu/GrGpu.cpp

Index: src/gpu/GrGpu.cpp
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 111f632502f075632028689fa64fcf483f7e9e29..f9e7ac3d57c3314bab65011e014280ade9658986 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -133,6 +133,24 @@ GrTexture* GrGpu::createTexture(const GrTextureDesc& desc,
     return tex;
 }
 
+GrTexture* GrGpu::createCompressedTexture(const GrTextureDesc& desc,
+                                          const void* srcData, GrCompressedFormat format) {
+    if (kUnknown_GrPixelConfig == desc.fConfig) {
+        return NULL;
+    }
+    if (desc.fFlags & kRenderTarget_GrTextureFlagBit) {
+        return NULL;
+    }
+
+    // Do we support this format?
+    if (!this->caps()->compressedTextureSupport(format)) {
+        return NULL;
+    }
+
+    this->handleDirtyContext();
+    return this->onCreateCompressedTexture(desc, srcData, format);
+}
+
 bool GrGpu::attachStencilBufferToRenderTarget(GrRenderTarget* rt) {
     SkASSERT(NULL == rt->getStencilBuffer());
     GrStencilBuffer* sb =