//tools/binary_size: Change merge symbols to have their size as padding

tools/binary_size/testdata/SymbolGroupMethods.golden

Index: tools/binary_size/testdata/SymbolGroupMethods.golden
diff --git a/tools/binary_size/testdata/SymbolGroupMethods.golden b/tools/binary_size/testdata/SymbolGroupMethods.golden
index f26e68296f3dcb9ef34b92830b5c1dc7ee9c1baf..e7fe5485d014ffb0441596c6f994380c07f003ab 100644
--- a/tools/binary_size/testdata/SymbolGroupMethods.golden
+++ b/tools/binary_size/testdata/SymbolGroupMethods.golden
@@ -1,50 +1,50 @@
 GroupByNamespace()
-Showing 10 symbols with total size: 2652154 bytes
+Showing 10 symbols with total size: 2652506 bytes
 .text=0 bytes    .rodata=0 bytes    other=2.53mb     total=2.53mb
 First columns are: running total, type, size
- 2651884 * 2651884  {global} (count=27)
- 2651978 * 94       blink::PaintChunker (count=1)
- 2652034 * 56       blink::ContiguousContainerBase (count=2)
- 2652082 * 48       chrome::mojom (count=2)
- 2652114 * 32       chrome::mojom::FilePatcher (count=1)
- 2652138 * 24       mojo (count=1)
- 2652146 * 8        google::protobuf::internal (count=2)
- 2652150 * 4        base::android (count=1)
- 2652154 * 4        blink::CSSValueKeywordsHash::findValueImpl (count=1)
- 2652154 * 0        SaveHistogram (count=1)
+ 2652236 * 2652236  {global} (count=27)
+ 2652330 * 94       blink::PaintChunker (count=1)
+ 2652386 * 56       blink::ContiguousContainerBase (count=2)
+ 2652434 * 48       chrome::mojom (count=2)
+ 2652466 * 32       chrome::mojom::FilePatcher (count=1)
+ 2652490 * 24       mojo (count=1)
+ 2652498 * 8        google::protobuf::internal (count=2)
+ 2652502 * 4        base::android (count=1)
+ 2652506 * 4        blink::CSSValueKeywordsHash::findValueImpl (count=1)
+ 2652506 * 0        SaveHistogram (count=1)
 GroupByNamespace(depth=1)
-Showing 7 symbols with total size: 2652154 bytes
+Showing 7 symbols with total size: 2652506 bytes
 .text=0 bytes    .rodata=0 bytes    other=2.53mb     total=2.53mb
 First columns are: running total, type, size
- 2651884 * 2651884  {global} (count=27)
- 2652038 * 154      blink (count=4)
- 2652118 * 80       chrome (count=3)
- 2652142 * 24       mojo (count=1)
- 2652150 * 8        google (count=2)
- 2652154 * 4        base (count=1)
- 2652154 * 0        SaveHistogram (count=1)
+ 2652236 * 2652236  {global} (count=27)
+ 2652390 * 154      blink (count=4)
+ 2652470 * 80       chrome (count=3)
+ 2652494 * 24       mojo (count=1)
+ 2652502 * 8        google (count=2)
+ 2652506 * 4        base (count=1)
+ 2652506 * 0        SaveHistogram (count=1)
 GroupByNamespace(depth=1, fallback=None)
-Showing 7 symbols with total size: 2652154 bytes
+Showing 7 symbols with total size: 2652506 bytes
 .text=0 bytes    .rodata=0 bytes    other=2.53mb     total=2.53mb
 First columns are: running total, type, size
- 2651884 * 2651884   (count=27)
- 2652038 * 154      blink (count=4)
- 2652118 * 80       chrome (count=3)
- 2652142 * 24       mojo (count=1)
- 2652150 * 8        google (count=2)
- 2652154 * 4        base (count=1)
- 2652154 * 0        SaveHistogram (count=1)
+ 2652236 * 2652236   (count=27)
+ 2652390 * 154      blink (count=4)
+ 2652470 * 80       chrome (count=3)
+ 2652494 * 24       mojo (count=1)
+ 2652502 * 8        google (count=2)
+ 2652506 * 4        base (count=1)
+ 2652506 * 0        SaveHistogram (count=1)
 GroupByNamespace(depth=1, min_count=2)
-Showing 7 symbols with total size: 2652154 bytes
+Showing 7 symbols with total size: 2652506 bytes
 .text=0 bytes    .rodata=0 bytes    other=2.53mb     total=2.53mb
 First columns are: running total, type, size
- 2651884 * 2651884  {global} (count=27)
- 2652038 * 154      blink (count=4)
- 2652118 * 80       chrome (count=3)
- 2652142 d@0x2cd8538   24      base/page_allocator.cc
+ 2652236 * 2652236  {global} (count=27)
+ 2652390 * 154      blink (count=4)
+ 2652470 * 80       chrome (count=3)
+ 2652494 d@0x2cd8538   24      base/page_allocator.cc
              mojo::MessageReceiver [vtable]
- 2652150 * 8        google (count=2)
- 2652154 d@0x2de70a0   4       third_party/container.c
+ 2652502 * 8        google (count=2)
+ 2652506 d@0x2de70a0   4       third_party/container.c
              base::android::g_renderer_histogram_code
- 2652154 b@0x2dffe80   200     third_party/icu/ucnv_ext.c
+ 2652506 b@0x2dffe80   200     third_party/icu/ucnv_ext.c
              SaveHistogram::atomic_histogram_pointer