Revert of Update GPU memory buffers to use StrideInBytes internally.

ui/gl/gl_image_memory.cc

Index: ui/gl/gl_image_memory.cc
diff --git a/ui/gl/gl_image_memory.cc b/ui/gl/gl_image_memory.cc
index 5e23d30778dd08389438753a5f3b6c33098ef77f..0a67e000665b6a5806a0f935f61e02faaf540a15 100644
--- a/ui/gl/gl_image_memory.cc
+++ b/ui/gl/gl_image_memory.cc
@@ -100,26 +100,18 @@
 }
 
 // static
-bool GLImageMemory::StrideInBytes(size_t width,
-                                  gfx::GpuMemoryBuffer::Format format,
-                                  size_t* stride_in_bytes) {
-  base::CheckedNumeric<size_t> s = width;
-  switch (format) {
-    case gfx::GpuMemoryBuffer::RGBA_8888:
-    case gfx::GpuMemoryBuffer::BGRA_8888:
-      s *= 4;
-      if (!s.IsValid())
-        return false;
-
-      *stride_in_bytes = s.ValueOrDie();
-      return true;
+size_t GLImageMemory::BytesPerPixel(gfx::GpuMemoryBuffer::Format format) {
+  switch (format) {
+    case gfx::GpuMemoryBuffer::RGBA_8888:
+    case gfx::GpuMemoryBuffer::BGRA_8888:
+      return 4;
     case gfx::GpuMemoryBuffer::RGBX_8888:
       NOTREACHED();
-      return false;
-  }
-
-  NOTREACHED();
-  return false;
+      return 0;
+  }
+
+  NOTREACHED();
+  return 0;
 }
 
 bool GLImageMemory::Initialize(const unsigned char* memory,