Use correct config variable in command buffer gl context

src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp

Index: src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp
diff --git a/src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp b/src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp
index 585f1d079eb3a4039b6a4fcc11f7c25526d9a035..61eab4bebfc20d1a300bd1f4a2b036983dedf93b 100644
--- a/src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp
+++ b/src/gpu/gl/command_buffer/SkCommandBufferGLContext.cpp
@@ -185,46 +185,73 @@ void SkCommandBufferGLContext::initializeGLContext(void* nativeWindow, const int
                                                    const int* surfaceAttribs) {
     LoadCommandBufferOnce();
     if (!gfFunctionsLoadedSuccessfully) {
+        SkDebugf("Command Buffer: Could not load EGL functions.\n");
         return;
     }
 
-    fDisplay = gfGetDisplay(static_cast<EGLNativeDisplayType>(EGL_DEFAULT_DISPLAY));
+    fDisplay = gfGetDisplay(EGL_DEFAULT_DISPLAY);
     if (EGL_NO_DISPLAY == fDisplay) {
-        SkDebugf("Could not create EGL display!");
+        SkDebugf("Command Buffer: Could not create EGL display.\n");
         return;
     }
 
     EGLint majorVersion;
     EGLint minorVersion;
-    gfInitialize(fDisplay, &majorVersion, &minorVersion);
+    if (!gfInitialize(fDisplay, &majorVersion, &minorVersion)) {
+        SkDebugf("Command Buffer: Could not initialize EGL display.\n");
+        this->destroyGLContext();
+        return;
+    }
 
-    EGLConfig surfaceConfig = static_cast<EGLConfig>(fConfig);
     EGLint numConfigs;
-    gfChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs);
+    if (!gfChooseConfig(fDisplay, configAttribs, static_cast<EGLConfig*>(&fConfig), 1,
+                        &numConfigs) || numConfigs != 1) {
+        SkDebugf("Command Buffer: Could not choose EGL config.\n");
+        this->destroyGLContext();
+        return;
+    }
 
     if (nativeWindow) {
-        fSurface = gfCreateWindowSurface(fDisplay, surfaceConfig,
-                                         (EGLNativeWindowType)nativeWindow, surfaceAttribs);
+        fSurface = gfCreateWindowSurface(fDisplay,
+                                         static_cast<EGLConfig>(fConfig),
+                                         (EGLNativeWindowType)nativeWindow,
+                                         surfaceAttribs);
     } else {
-        fSurface = gfCreatePbufferSurface(fDisplay, surfaceConfig, surfaceAttribs);
+        fSurface = gfCreatePbufferSurface(fDisplay,
+                                          static_cast<EGLConfig>(fConfig),
+                                          surfaceAttribs);
+    }
+    if (EGL_NO_SURFACE == fSurface) {
+        SkDebugf("Command Buffer: Could not create EGL surface.\n");
+        this->destroyGLContext();
+        return;
     }
 
     static const EGLint contextAttribs[] = {
         EGL_CONTEXT_CLIENT_VERSION, 2,
         EGL_NONE
     };
-    fContext = gfCreateContext(fDisplay, surfaceConfig, nullptr, contextAttribs);
+    fContext = gfCreateContext(fDisplay, static_cast<EGLConfig>(fConfig), nullptr, contextAttribs);
+    if (EGL_NO_CONTEXT == fContext) {
+        SkDebugf("Command Buffer: Could not create EGL context.\n");
+        this->destroyGLContext();
+        return;
+    }
 
-    gfMakeCurrent(fDisplay, fSurface, fSurface, fContext);
+    if (!gfMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
+        SkDebugf("Command Buffer: Could not make EGL context current.\n");
+        this->destroyGLContext();
+        return;
+    }
 
     SkAutoTUnref<const GrGLInterface> gl(GrGLCreateCommandBufferInterface());
     if (nullptr == gl.get()) {
-        SkDebugf("Could not create CommandBuffer GL interface!\n");
+        SkDebugf("Command Buffer: Could not create CommandBuffer GL interface.\n");
         this->destroyGLContext();
         return;
     }
     if (!gl->validate()) {
-        SkDebugf("Could not validate CommandBuffer GL interface!\n");
+        SkDebugf("Command Buffer: Could not validate CommandBuffer GL interface.\n");
         this->destroyGLContext();
         return;
     }
@@ -264,7 +291,7 @@ void SkCommandBufferGLContext::onPlatformMakeCurrent() const {
         return;
     }
     if (!gfMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
-        SkDebugf("Could not set the context.\n");
+        SkDebugf("Command Buffer: Could not make EGL context current.\n");
     }
 }
 
@@ -273,7 +300,7 @@ void SkCommandBufferGLContext::onPlatformSwapBuffers() const {
         return;
     }
     if (!gfSwapBuffers(fDisplay, fSurface)) {
-        SkDebugf("Could not complete gfSwapBuffers.\n");
+        SkDebugf("Command Buffer: Could not complete gfSwapBuffers.\n");
     }
 }
 
@@ -298,14 +325,12 @@ bool SkCommandBufferGLContext::makeCurrent() {
 
 int SkCommandBufferGLContext::getStencilBits() {
     EGLint result = 0;
-    EGLConfig surfaceConfig = static_cast<EGLConfig>(fConfig);
-    gfGetConfigAttrib(fDisplay, surfaceConfig, EGL_STENCIL_SIZE, &result);
+    gfGetConfigAttrib(fDisplay, static_cast<EGLConfig>(fConfig), EGL_STENCIL_SIZE, &result);
     return result;
 }
 
 int SkCommandBufferGLContext::getSampleCount() {
     EGLint result = 0;
-    EGLConfig surfaceConfig = static_cast<EGLConfig>(fConfig);
-    gfGetConfigAttrib(fDisplay, surfaceConfig, EGL_SAMPLES, &result);
+    gfGetConfigAttrib(fDisplay, static_cast<EGLConfig>(fConfig), EGL_SAMPLES, &result);
     return result;
 }