LibGfx/ICC: Move MatrixMatrixConversion::map() inline

According to ministat, a bit faster to render page 3 of 0000849.pdf:

```
    N           Min           Max        Median         Avg       Stddev
x  50      1.000875     1.0427601     1.0208509   1.0201902   0.01066116
+  50    0.99707389       1.03614     1.0084391   1.0107864  0.010002724
Difference at 95.0% confidence
	-0.00940384 +/- 0.0041018
	-0.921773% +/- 0.402062%
	(Student's t, pooled s = 0.0103372)
```

Userland/Libraries/LibGfx/ICC/Profile.cpp

@@ -1588,41 +1588,6 @@ MatrixMatrixConversion::MatrixMatrixConversion(LutCurveType source_red_TRC,
 {
 }
 
-Color MatrixMatrixConversion::map(FloatVector3 in_rgb) const
-{
-    auto evaluate_curve = [](TagData const& trc, float f) {
-        VERIFY(trc.type() == CurveTagData::Type || trc.type() == ParametricCurveTagData::Type);
-        if (trc.type() == CurveTagData::Type)
-            return static_cast<CurveTagData const&>(trc).evaluate(f);
-        return static_cast<ParametricCurveTagData const&>(trc).evaluate(f);
-    };
-
-    auto evaluate_curve_inverse = [](TagData const& trc, float f) {
-        VERIFY(trc.type() == CurveTagData::Type || trc.type() == ParametricCurveTagData::Type);
-        if (trc.type() == CurveTagData::Type)
-            return static_cast<CurveTagData const&>(trc).evaluate_inverse(f);
-        return static_cast<ParametricCurveTagData const&>(trc).evaluate_inverse(f);
-    };
-
-    FloatVector3 linear_rgb = {
-        evaluate_curve(m_source_red_TRC, in_rgb[0]),
-        evaluate_curve(m_source_green_TRC, in_rgb[1]),
-        evaluate_curve(m_source_blue_TRC, in_rgb[2]),
-    };
-    linear_rgb = m_matrix * linear_rgb;
-
-    linear_rgb.clamp(0.f, 1.f);
-    float device_r = evaluate_curve_inverse(m_destination_red_TRC, linear_rgb[0]);
-    float device_g = evaluate_curve_inverse(m_destination_green_TRC, linear_rgb[1]);
-    float device_b = evaluate_curve_inverse(m_destination_blue_TRC, linear_rgb[2]);
-
-    u8 out_r = round(255 * device_r);
-    u8 out_g = round(255 * device_g);
-    u8 out_b = round(255 * device_b);
-
-    return Color(out_r, out_g, out_b);
-}
-
 Optional<MatrixMatrixConversion> Profile::matrix_matrix_conversion(Profile const& source_profile) const
 {
     auto has_normal_device_class = [](DeviceClass device) {

Userland/Libraries/LibGfx/ICC/Profile.h

@@ -172,6 +172,41 @@ private:
     LutCurveType m_destination_blue_TRC;
 };
 
+inline Color MatrixMatrixConversion::map(FloatVector3 in_rgb) const
+{
+    auto evaluate_curve = [](TagData const& trc, float f) {
+        VERIFY(trc.type() == CurveTagData::Type || trc.type() == ParametricCurveTagData::Type);
+        if (trc.type() == CurveTagData::Type)
+            return static_cast<CurveTagData const&>(trc).evaluate(f);
+        return static_cast<ParametricCurveTagData const&>(trc).evaluate(f);
+    };
+
+    auto evaluate_curve_inverse = [](TagData const& trc, float f) {
+        VERIFY(trc.type() == CurveTagData::Type || trc.type() == ParametricCurveTagData::Type);
+        if (trc.type() == CurveTagData::Type)
+            return static_cast<CurveTagData const&>(trc).evaluate_inverse(f);
+        return static_cast<ParametricCurveTagData const&>(trc).evaluate_inverse(f);
+    };
+
+    FloatVector3 linear_rgb = {
+        evaluate_curve(m_source_red_TRC, in_rgb[0]),
+        evaluate_curve(m_source_green_TRC, in_rgb[1]),
+        evaluate_curve(m_source_blue_TRC, in_rgb[2]),
+    };
+    linear_rgb = m_matrix * linear_rgb;
+
+    linear_rgb.clamp(0.f, 1.f);
+    float device_r = evaluate_curve_inverse(m_destination_red_TRC, linear_rgb[0]);
+    float device_g = evaluate_curve_inverse(m_destination_green_TRC, linear_rgb[1]);
+    float device_b = evaluate_curve_inverse(m_destination_blue_TRC, linear_rgb[2]);
+
+    u8 out_r = round(255 * device_r);
+    u8 out_g = round(255 * device_g);
+    u8 out_b = round(255 * device_b);
+
+    return Color(out_r, out_g, out_b);
+}
+
 class Profile : public RefCounted<Profile> {
 public:
     static ErrorOr<NonnullRefPtr<Profile>> try_load_from_externally_owned_memory(ReadonlyBytes);