Fix up all the easy virtual ... SK_OVERRIDE cases.

This fixes every case where virtual and SK_OVERRIDE were on the same line,
which should be the bulk of cases.  We'll have to manually clean up the rest
over time unless I level up in regexes.

for f in (find . -type f); perl -p -i -e 's/virtual (.*)SK_OVERRIDE/\1SK_OVERRIDE/g' $f; end

BUG=skia:

Review URL: https://codereview.chromium.org/806653007
diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.h b/src/gpu/effects/GrMatrixConvolutionEffect.h
index 8d6bb7c..8f92175 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.h
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.h
@@ -60,11 +60,11 @@
     bool convolveAlpha() const { return fConvolveAlpha; }
     const GrTextureDomain& domain() const { return fDomain; }
 
-    virtual const char* name() const SK_OVERRIDE { return "MatrixConvolution"; }
+    const char* name() const SK_OVERRIDE { return "MatrixConvolution"; }
 
-    virtual void getGLProcessorKey(const GrGLCaps&, GrProcessorKeyBuilder*) const SK_OVERRIDE;
+    void getGLProcessorKey(const GrGLCaps&, GrProcessorKeyBuilder*) const SK_OVERRIDE;
 
-    virtual GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
+    GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
 
 private:
     GrMatrixConvolutionEffect(GrTexture*,
@@ -77,9 +77,9 @@
                               GrTextureDomain::Mode tileMode,
                               bool convolveAlpha);
 
-    virtual bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE;
+    bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE;
 
-    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE {
+    void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE {
         // TODO: Try to do better?
         inout->mulByUnknownFourComponents();
     }