supersize: Don't cluster by default. Make Diff() accept only SizeInfo.

tools/binary_size/libsupersize/testdata/FullDescription.golden

 Metadata:
     elf_arch=ARM
     elf_build_id=WhatAnAmazingBuildId
     elf_file_name=elf
     elf_mtime={redacted}
     git_revision=abc123
     gn_args=var1=true var2="foo"
     map_file_name=../test.map
 
 Section Sizes (Total=43,785,380 bytes):
     .bss: 1,300,456 bytes (not included in totals)
     .data: 101,768 bytes (0.2%)
     .data.rel.ro: 1,065,224 bytes (2.4%)
     .data.rel.ro.local: 790,024 bytes (1.8%)
     .rodata: 5,927,652 bytes (13.5%)
     .text: 35,900,712 bytes (82.0%)
 
+Other section sizes:
+    .ARM.attributes: 60 bytes
+    .ARM.exidx: 1,536,456 bytes
+    .ARM.extab: 183,632 bytes
+    .dynamic: 304 bytes
+    .dynstr: 4,025 bytes
+    .dynsym: 6,496 bytes
+    .fini_array: 8 bytes
+    .gnu.version: 812 bytes
+    .gnu.version_d: 28 bytes
+    .gnu.version_r: 96 bytes
+    .got: 42,956 bytes
+    .hash: 2,684 bytes
+    .init_array: 8 bytes
+    .interp: 19 bytes
+    .note.gnu.build-id: 36 bytes
+    .note.gnu.gold-version: 28 bytes
+    .plt: 4,244 bytes
+    .rel.dyn: 2,655,384 bytes
+    .rel.plt: 2,816 bytes
+    .shstrtab: 436 bytes
+    .strtab: 34,841,854 bytes
+    .symtab: 17,166,112 bytes
+
+Section r: has 44.6% of 2641540 bytes accounted for from 6 symbols. 3286112 bytes are unaccounted for.
+* Padding accounts for 366 bytes (0.0%)
+* Contains 0 aliases
+* 0 symbols have shared ownership
+* Without 1 merge sections (accounting for 2641394 bytes):
+  * Section r: has 0.0% of 146 bytes accounted for from 5 symbols. 5927506 bytes are unaccounted for.
+Section b: has 40.3% of 524520 bytes accounted for from 6 symbols. 775936 bytes are unaccounted for.
+* Padding accounts for 196 bytes (0.0%)
+* Contains 0 aliases
+* 0 symbols have shared ownership
+Section d: has 40.4% of 790284 bytes accounted for from 13 symbols. 1166732 bytes are unaccounted for.
+* Padding accounts for 16 bytes (0.0%)
+* Contains 0 aliases
+* 0 symbols have shared ownership
+Section t: has 0.2% of 79710 bytes accounted for from 16 symbols. 35821002 bytes are unaccounted for.
+* Padding accounts for 9806 bytes (12.3%)
+* Contains 5 aliases, mapped to 2 addresses (60 bytes)
+* 1 symbols have shared ownership (12 bytes)
+* Without 1 merge sections (accounting for 9758 bytes):
+  * Section t: has 0.2% of 69952 bytes accounted for from 15 symbols. 35830760 bytes are unaccounted for.
+
 Showing 41 symbols with total pss: 4036054 bytes
 .text=77.8kb     .rodata=2.52mb     other=1.25mb     total=3.85mb
 Number of object files: 10
 
 First columns are: running total, address, pss
- 2641394 r@Group      2641394 {no path}
-             ** merge strings (count=2)
- 3431298 d@0x2c17740  789904  third_party/container.c
-             chrome::mojom::FieldTrialRecorderProxy [vtable]
- 3500422 t@0x28f1e0   69124   third_party/icu/ucnv_ext.c
-             foo_bar
- 3510180 t@Group      9758    {no path}
-             ** symbol gaps (count=2)
- 3510628 t@0x28f000   448     third_party/icu/ucnv_ext.c
-             ucnv_extMatchFromU
- 3510780 d@0x2de7008  152     third_party/container.c
-             base::android::kBaseRegisteredMethods
- 3510874 t@0x2a1000   94      third_party/container.c
-             blink::PaintChunker::releasePaintChunks [clone .part.1]
- 3510930 d@0x2c176f0  56      third_party/icu/ucnv_ext.c
-             ChromeMainDelegate [vtable]
- 3510986 d@0x2cd8500  56      third_party/paint.cc
-             ChromeMainDelegateAndroid [vtable]
- 3511042 t@0x28d910   56      base/page_allocator.cc
-             _GLOBAL__sub_I_bbr_sender.cc
- 3511097 r@0x28f3450  55      third_party/paint.cc
-             kAnimationFrameTimeHistogramClassPath
- 3511121 t@0x2a0000   24      third_party/icu/ucnv_ext.c
-             BazAlias
- 3511145 t@0x2a0000   24      {no path}
-             blink::ContiguousContainerBase::shrinkToFit
- 3511189 r@0x284e370  44      base/page_allocator.cc
-             Name
- 3511227 t@0x28d964   38      base/page_allocator.cc
-             extFromUUseMapping
- 3511259 d@0x2cd84e0  32      third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o
-             .Lswitch.table.45
- 3511291 r@0x284e398  32      third_party/container.c
-             chrome::mojom::FilePatcher::Name_
- 3511323 t@0x28d98a   32      base/page_allocator.cc
-             extFromUUseMapping
- 3511351 t@0x28f1c8   28      third_party/icu/ucnv_ext.c
-             _GLOBAL__sub_I_SkDeviceProfile.cpp
- 3511379 t@0x28d948   28      base/page_allocator.cc
-             _GLOBAL__sub_I_pacing_sender.cc
- 3511407 t@0x2a0020   28      third_party/container.c
-             blink::ContiguousContainerBase::ContiguousContainerBase
- 3511431 d@0x2c17728  24      third_party/icu/ucnv_ext.c
-             chrome::mojom::FieldTrialRecorder [vtable]
- 3511455 d@0x2cd8538  24      base/page_allocator.cc
-             mojo::MessageReceiver [vtable]
- 3511471 t@0x28d900   16      base/page_allocator.cc
-             _GLOBAL__sub_I_page_allocator.cc
- 3511475 t@0x2a0010   4       third_party/fft_float.cc
-             BarAlias
- 3511479 t@0x2a0010   4       third_party/fft_float.cc
-             FooAlias
- 3511483 t@0x2a0010   4       third_party/{shared}/2
-             blink::ContiguousContainerBase::shrinkToFit [clone .part.1234] [clone .isra.2]
- 3511495 d@0x2cd8550  12      base/page_allocator.cc
-             kMethodsAnimationFrameTimeHistogram
- 3511506 r@0x284e364  11      base/page_allocator.cc
- 3511514 d@0x2cd84f0  8       third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o
-             kSystemClassPrefixes
- 3511518 d@0x2de70a4  4       third_party/container.c
-             base::android::g_library_version_number
- 3511522 d@0x2de70a0  4       third_party/container.c
-             base::android::g_renderer_histogram_code
- 3511526 r@0x28f3480  4       third_party/paint.cc
-             blink::CSSValueKeywordsHash::findValueImpl::value_word_list
- 3511530 d@0x2de7000  4       base/page_allocator.cc
-             google::protobuf::internal::pLinuxKernelCmpxchg
- 3511534 d@0x2de7004  4       third_party/container.c
-             google::protobuf::internal::pLinuxKernelMemoryBarrier
- 3511534 b@0x0        262144  third_party/fft_float.cc
-             ff_cos_131072
- 3511534 b@0x0        131072  third_party/fft_fixed.cc
-             ff_cos_131072_fixed
- 3511534 b@0x0        131072  third_party/fft_float.cc
-             ff_cos_65536
- 3511534 b@0x2dffe80  200     third_party/icu/ucnv_ext.c
-             SaveHistogram::atomic_histogram_pointer
- 3511534 b@0x2dffda0  28      third_party/icu/ucnv_ext.c
-             g_chrome_content_browser_client
- 3511534 b@0x2dffe84  4       third_party/icu/ucnv_ext.c
-             g_AnimationFrameTimeHistogram_clazz
+ 2641394 r@Group      pss=2641394  padding=352  size_without_padding=2641042  count=2
+             source_path=       object_path=
+             flags={}  name=** merge strings
+>  1965409 r@0x266e600  pss=1965409  padding=0  size_without_padding=1965409
+               source_path=     object_path=
+               flags={}  name=** merge strings
+>  2641394 r@0x284e518  pss=675985  padding=352  size_without_padding=675633
+               source_path=     object_path=
+               flags={}  name=** merge strings
+ 3431298 d@0x2c17740  pss=789904  padding=0  size_without_padding=789904
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={}  name=chrome::mojom::FieldTrialRecorderProxy [vtable]
+ 3500422 t@0x28f1e0   pss=69124  padding=4  size_without_padding=69120
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={unlikely}  name=foo_bar
+ 3510180 t@Group      pss=9758  padding=9758  size_without_padding=0  count=2
+             source_path=       object_path=
+             flags={}  name=** symbol gaps
+>     5718 t@0x28f000   pss=5718  padding=5718  size_without_padding=0
+               source_path=third_party/icu/ucnv_ext.c   object_path=third_party/icu/icuuc/ucnv_ext.o
+               flags={}  name=** symbol gap 0
+>     9758 t@0x2a1000   pss=4040  padding=4040  size_without_padding=0
+               source_path=third_party/container.c      object_path=third_party/WebKit.a/ContiguousContainer.o
+               flags={}  name=** symbol gap 1
+ 3510628 t@0x28f000   pss=448  padding=0  size_without_padding=448
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={}  name=ucnv_extMatchFromU
+                        full_name=ucnv_extMatchFromU(int const*, int, unsigned short const*, int, unsigned short const*, int, unsigned int*, signed char, signed char)
+ 3510780 d@0x2de7008  pss=152  padding=0  size_without_padding=152
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={rel}  name=base::android::kBaseRegisteredMethods
+ 3510874 t@0x2a1000   pss=94  padding=0  size_without_padding=94
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={anon}  name=blink::PaintChunker::releasePaintChunks [clone .part.1]
+                        full_name=blink::PaintChunker::releasePaintChunks() [clone .part.1]
+ 3510930 d@0x2c176f0  pss=56  padding=0  size_without_padding=56
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={}  name=ChromeMainDelegate [vtable]
+ 3510986 d@0x2cd8500  pss=56  padding=0  size_without_padding=56
+             source_path=third_party/paint.cc   object_path=third_party/WebKit.a/PaintChunker.o
+             flags={}  name=ChromeMainDelegateAndroid [vtable]
+ 3511042 t@0x28d910   pss=56  padding=0  size_without_padding=56
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={startup}  name=_GLOBAL__sub_I_bbr_sender.cc
+ 3511097 r@0x28f3450  pss=55  padding=7  size_without_padding=48
+             source_path=third_party/paint.cc   object_path=third_party/WebKit.a/PaintChunker.o
+             flags={anon}  name=kAnimationFrameTimeHistogramClassPath
+ 3511121 t@0x2a0000   pss=24  padding=32  size_without_padding=16
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={2 aliases}  name=BazAlias
+                        full_name=BazAlias(bool)
+ 3511145 t@0x2a0000   pss=24  padding=32  size_without_padding=16
+             source_path=       object_path=
+             flags={2 aliases}  name=blink::ContiguousContainerBase::shrinkToFit
+                        full_name=blink::ContiguousContainerBase::shrinkToFit()
+ 3511189 r@0x284e370  pss=44  padding=4  size_without_padding=40
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=Name
+ 3511227 t@0x28d964   pss=38  padding=0  size_without_padding=38
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=extFromUUseMapping
+                        full_name=extFromUUseMapping(signed char, unsigned int, int)
+ 3511259 d@0x2cd84e0  pss=32  padding=16  size_without_padding=16
+             source_path=       object_path=third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o
+             flags={}  name=.Lswitch.table.45
+ 3511291 r@0x284e398  pss=32  padding=0  size_without_padding=32
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={}  name=chrome::mojom::FilePatcher::Name_
+ 3511323 t@0x28d98a   pss=32  padding=0  size_without_padding=32
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=extFromUUseMapping
+                        full_name=extFromUUseMapping(aj, int)
+ 3511351 t@0x28f1c8   pss=28  padding=8  size_without_padding=20
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={startup}  name=_GLOBAL__sub_I_SkDeviceProfile.cpp
+ 3511379 t@0x28d948   pss=28  padding=0  size_without_padding=28
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={startup}  name=_GLOBAL__sub_I_pacing_sender.cc
+ 3511407 t@0x2a0020   pss=28  padding=4  size_without_padding=24
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={}  name=blink::ContiguousContainerBase::ContiguousContainerBase
+                        full_name=blink::ContiguousContainerBase::ContiguousContainerBase(blink::ContiguousContainerBase&&)
+ 3511431 d@0x2c17728  pss=24  padding=0  size_without_padding=24
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={}  name=chrome::mojom::FieldTrialRecorder [vtable]
+ 3511455 d@0x2cd8538  pss=24  padding=0  size_without_padding=24
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=mojo::MessageReceiver [vtable]
+ 3511471 t@0x28d900   pss=16  padding=0  size_without_padding=16
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={startup}  name=_GLOBAL__sub_I_page_allocator.cc
+ 3511475 t@0x2a0010   pss=4  padding=0  size_without_padding=12
+             source_path=third_party/fft_float.cc       object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o
+             flags={3 aliases}  name=BarAlias
+                        full_name=BarAlias()
+ 3511479 t@0x2a0010   pss=4  padding=0  size_without_padding=12
+             source_path=third_party/fft_float.cc       object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o
+             flags={3 aliases}  name=FooAlias
+                        full_name=FooAlias()
+ 3511483 t@0x2a0010   pss=4  padding=0  size_without_padding=12
+             source_path=third_party/{shared}/2         object_path=third_party/{shared}/2
+             flags={3 aliases}  name=blink::ContiguousContainerBase::shrinkToFit [clone .part.1234] [clone .isra.2]
+                        full_name=blink::ContiguousContainerBase::shrinkToFit() [clone .part.1234] [clone .isra.2]
+ 3511495 d@0x2cd8550  pss=12  padding=0  size_without_padding=12
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=kMethodsAnimationFrameTimeHistogram
+ 3511506 r@0x284e364  pss=11  padding=3  size_without_padding=8
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+ 3511514 d@0x2cd84f0  pss=8  padding=0  size_without_padding=8
+             source_path=       object_path=third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o
+             flags={anon}  name=kSystemClassPrefixes
+ 3511518 d@0x2de70a4  pss=4  padding=0  size_without_padding=4
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={anon,rel.loc}  name=base::android::g_library_version_number
+ 3511522 d@0x2de70a0  pss=4  padding=0  size_without_padding=4
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={anon}  name=base::android::g_renderer_histogram_code
+ 3511526 r@0x28f3480  pss=4  padding=0  size_without_padding=4
+             source_path=third_party/paint.cc   object_path=third_party/WebKit.a/PaintChunker.o
+             flags={anon}  name=blink::CSSValueKeywordsHash::findValueImpl::value_word_list
+                        full_name=blink::CSSValueKeywordsHash::findValueImpl(char const*, unsigned int)::value_word_list
+ 3511530 d@0x2de7000  pss=4  padding=0  size_without_padding=4
+             source_path=base/page_allocator.cc         object_path=base/base/page_allocator.o
+             flags={}  name=google::protobuf::internal::pLinuxKernelCmpxchg
+ 3511534 d@0x2de7004  pss=4  padding=0  size_without_padding=4
+             source_path=third_party/container.c        object_path=third_party/WebKit.a/ContiguousContainer.o
+             flags={}  name=google::protobuf::internal::pLinuxKernelMemoryBarrier
+ 3511534 b@0x0        pss=262144  padding=0  size_without_padding=262144
+             source_path=third_party/fft_float.cc       object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o
+             flags={}  name=ff_cos_131072
+ 3511534 b@0x0        pss=131072  padding=0  size_without_padding=131072
+             source_path=third_party/fft_fixed.cc       object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_fixed.o
+             flags={}  name=ff_cos_131072_fixed
+ 3511534 b@0x0        pss=131072  padding=0  size_without_padding=131072
+             source_path=third_party/fft_float.cc       object_path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o
+             flags={}  name=ff_cos_65536
+ 3511534 b@0x2dffe80  pss=200  padding=196  size_without_padding=4
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={}  name=SaveHistogram::atomic_histogram_pointer
+                        full_name=SaveHistogram(_JNIEnv*, base::android::JavaParamRef<_jobject*> const&, base::android::JavaParamRef<_jstring*> const&, base::android::JavaParamRef<_jlongArray*> const&, int)::atomic_histogram_pointer
+ 3511534 b@0x2dffda0  pss=28  padding=0  size_without_padding=28
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={}  name=g_chrome_content_browser_client
+ 3511534 b@0x2dffe84  pss=4  padding=0  size_without_padding=4
+             source_path=third_party/icu/ucnv_ext.c     object_path=third_party/icu/icuuc/ucnv_ext.o
+             flags={anon}  name=g_AnimationFrameTimeHistogram_clazz