content: Add GpuMemoryBuffer MemoryDumpProvider implementation.

content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc b/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
index 0fa6e814c896c45177791ab0a6c4c33cb9cfec77..b1611b38e2ac90f42a95519eb77c00e457451284 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
@@ -82,12 +82,13 @@ bool GpuMemoryBufferImplSurfaceTexture::Map(void** data) {
     return false;
   }
 
-  size_t stride_in_bytes = 0;
-  if (!StrideInBytes(buffer.stride, format_, 0, &stride_in_bytes))
-    return false;
-
   DCHECK_LE(size_.width(), buffer.stride);
-  stride_ = stride_in_bytes;
+  size_t row_size_in_bytes = 0;
+  bool valid_row_size =
+      RowSizeInBytes(buffer.stride, format_, 0, &row_size_in_bytes);
+  DCHECK(valid_row_size);
+
+  stride_ = row_size_in_bytes;
   mapped_ = true;
   *data = buffer.bits;
   return true;