V2 of //tools/binary_size rewrite (diffs).

tools/binary_size/testdata/Map2Size.golden

+.bss@0(size=262144,padding=0,name=ff_cos_131072,path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o)
+.bss@0(size=131072,padding=0,name=ff_cos_131072_fixed,path=third_party/ffmpeg/libffmpeg_internal.a/fft_fixed.o)
+.bss@0(size=131072,padding=0,name=ff_cos_65536,path=third_party/ffmpeg/libffmpeg_internal.a/fft_float.o)
+.text@28d900(size=16,padding=0,name=startup._GLOBAL__sub_I_page_allocator.cc,path=base/base/page_allocator.o)
+.text@28d910(size=56,padding=0,name=startup._GLOBAL__sub_I_bbr_sender.cc,path=net/net/bbr_sender.o)
+.text@28d948(size=28,padding=0,name=startup._GLOBAL__sub_I_pacing_sender.cc,path=net/net/pacing_sender.o)
+.text@28d964(size=38,padding=0,name=extFromUUseMapping,path=third_party/icu/icuuc/ucnv_ext.o)
+.text@28d98a(size=5750,padding=0,name=** symbol gap 0,path=third_party/icu/icuuc/ucnv_ext.o)
+.text@28f000(size=448,padding=0,name=ucnv_extMatchFromU,path=third_party/icu/icuuc/ucnv_ext.o)
+.text@28f1c8(size=20,padding=8,name=startup._GLOBAL__sub_I_SkDeviceProfile.cpp,path=skia/skia/SkDeviceProfile.o)
+.text@28f1e0(size=20,padding=4,name=startup._GLOBAL__sub_I_SkDiscardableMemoryPool.cpp,path=skia/skia/SkDiscardableMemoryPool.o)
+.text@680000(size=28,padding=0,name=blink::ContiguousContainerBase::shrinkToFit,path=third_party/WebKit/Source/platform/platform/ContiguousContainer.o)
+.text@6818b0(size=24,padding=0,name=blink::ContiguousContainerBase::ContiguousContainerBase,path=third_party/WebKit/Source/platform/platform/ContiguousContainer.o)
+.text@680034(size=67880,padding=-6292,name=** symbol gap 1,path=third_party/WebKit/Source/platform/platform/PaintChunker.o)
+.text@69095c(size=94,padding=0,name=blink::PaintChunker::releasePaintChunks,path=third_party/WebKit/Source/platform/platform/PaintChunker.o)
+.rodata@266e600(size=1965409,padding=0,name=** merge strings,path=)
+.rodata@284e364(size=8,padding=3,name=,path=chrome/chrome_android_core/chrome_main_delegate.o)
+.rodata@284e370(size=40,padding=4,name=chrome::mojom::FieldTrialRecorder::Name_,path=chrome/common/mojo_bindings/field_trial_recorder.mojom.o)
+.rodata@284e398(size=32,padding=0,name=chrome::mojom::FilePatcher::Name_,path=chrome/common/mojo_bindings/file_patcher.mojom.o)
+.rodata@284e518(size=675633,padding=0,name=** merge strings,path=)
+.rodata@28f3450(size=48,padding=7,name=kAnimationFrameTimeHistogramClassPath,path=base/base/animation_frame_time_histogram.o)
+.data.rel.ro.local@2c176f0(size=56,padding=0,name=ChromeMainDelegate [vtable],path=chrome/chrome_android_core/chrome_main_delegate.o)
+.data.rel.ro.local@2c17728(size=24,padding=0,name=chrome::mojom::FieldTrialRecorderRequestValidator [vtable],path=chrome/common/mojo_bindings/field_trial_recorder.mojom.o)
+.data.rel.ro.local@2c17740(size=24,padding=0,name=chrome::mojom::FieldTrialRecorderProxy [vtable],path=chrome/common/mojo_bindings/field_trial_recorder.mojom.o)
+.data.rel.ro.local@2cd84e0(size=16,padding=0,name=.Lswitch.table.45,path=third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o)
+.data.rel.ro.local@2cd84f0(size=8,padding=0,name=kSystemClassPrefixes,path=third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o)
+.data.rel.ro@2cd8500(size=56,padding=0,name=ChromeMainDelegateAndroid [vtable],path=chrome/chrome_android_core/chrome_main_delegate_android.o)
+.data.rel.ro@2cd8538(size=24,padding=0,name=mojo::MessageReceiver [vtable],path=chrome/common/mojo_bindings/module_event_sink_win.mojom.o)
+.data.rel.ro@2cd8550(size=12,padding=0,name=kMethodsAnimationFrameTimeHistogram,path=base/base/animation_frame_time_histogram.o)
+.data@2de7000(size=4,padding=0,name=google::protobuf::internal::pLinuxKernelCmpxchg,path=chrome/chrome_android_core/chrome_main_delegate_android.o)
+.data@2de7004(size=4,padding=0,name=google::protobuf::internal::pLinuxKernelMemoryBarrier,path=chrome/chrome_android_core/chrome_main_delegate_android.o)
+.data@2de7008(size=152,padding=0,name=rel._ZN4base7androidL22kBaseRegisteredMethodsE,path=base/base/base_jni_registrar.o)
+.data@2de70a0(size=4,padding=0,name=base::android::g_renderer_histogram_code,path=base/base/library_loader_hooks.o)
+.data@2de70a4(size=4,padding=0,name=rel.local._ZN4base7android12_GLOBAL__N_124g_library_version_numberE,path=base/base/library_loader_hooks.o)
+.bss@2dffda0(size=28,padding=0,name=g_chrome_content_browser_client,path=chrome/chrome_android_core/chrome_main_delegate.o)
+.bss@2dffe80(size=4,padding=196,name=SaveHistogram(_JNIEnv*, base::android::JavaParamRef<_jobject*> const&, base::android::JavaParamRef<_jstring*> const&, base::android::JavaParamRef<_jlongArray*> const&, int)::atomic_histogram_pointer,path=base/base/animation_frame_time_histogram.o)
+.bss@2dffe84(size=4,padding=0,name=_ZN12_GLOBAL__N_135g_AnimationFrameTimeHistogram_clazzE,path=base/base/animation_frame_time_histogram.o)