Remove unused GC::writePixels() wrapper.

Source/platform/graphics/GraphicsContextTest.cpp

Index: Source/platform/graphics/GraphicsContextTest.cpp
diff --git a/Source/platform/graphics/GraphicsContextTest.cpp b/Source/platform/graphics/GraphicsContextTest.cpp
index fe8b95e939a8b6b9ff9302c82b5914cec334658a..136a442936d3d093877e79b6df1431265472ec96 100644
--- a/Source/platform/graphics/GraphicsContextTest.cpp
+++ b/Source/platform/graphics/GraphicsContextTest.cpp
@@ -786,7 +786,11 @@ TEST(GraphicsContextTest, trackOpaqueWritePixelsTest)
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
 
-    context.writePixels(opaqueBitmap, 50, 50);
+    {

[Stephen White, 2014/10/16 21:48:33]

Nit: maybe we should make writePixels a helper function in this file, to save
writing the same stanza 5 times below?

[f(malita), 2014/10/16 22:02:19]

Thanks, done.

+        SkAutoLockPixels locker(opaqueBitmap);
+        context.writePixels(opaqueBitmap.info(), opaqueBitmap.getPixels(), opaqueBitmap.rowBytes(),
+            50, 50);
+    }
     EXPECT_EQ_RECT(IntRect(50, 50, 10, 10), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
@@ -794,19 +798,35 @@ TEST(GraphicsContextTest, trackOpaqueWritePixelsTest)
     EXPECT_EQ_RECT(IntRect(10, 10, 90, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
-    context.writePixels(alphaBitmap, 10, 0);
+    {
+        SkAutoLockPixels locker(alphaBitmap);
+        context.writePixels(alphaBitmap.info(), alphaBitmap.getPixels(), alphaBitmap.rowBytes(),
+            10, 0);
+    }
     EXPECT_EQ_RECT(IntRect(10, 10, 90, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
-    context.writePixels(alphaBitmap, 10, 1);
+    {
+        SkAutoLockPixels locker(alphaBitmap);
+        context.writePixels(alphaBitmap.info(), alphaBitmap.getPixels(), alphaBitmap.rowBytes(),
+            10, 1);
+    }
     EXPECT_EQ_RECT(IntRect(10, 11, 90, 89), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
-    context.writePixels(alphaBitmap, 0, 10);
+    {
+        SkAutoLockPixels locker(alphaBitmap);
+        context.writePixels(alphaBitmap.info(), alphaBitmap.getPixels(), alphaBitmap.rowBytes(),
+            0, 10);
+    }
     EXPECT_EQ_RECT(IntRect(10, 11, 90, 89), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
-    context.writePixels(alphaBitmap, 1, 10);
+    {
+        SkAutoLockPixels locker(alphaBitmap);
+        context.writePixels(alphaBitmap.info(), alphaBitmap.getPixels(), alphaBitmap.rowBytes(),
+            1, 10);
+    }
     EXPECT_EQ_RECT(IntRect(11, 11, 89, 89), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 }