Support importing simpleperf trace files from Android Studio

.eslintignore

@@ -1,3 +1,4 @@
+src/profile-logic/import/proto
 src/types/libdef/npm
 docs-user
 coverage

.flowconfig

@@ -10,6 +10,7 @@ esproposal.optional_chaining=enable
 [ignore]
 <PROJECT_ROOT>/node_modules/.*
 <PROJECT_ROOT>/dist/.*
+src/profile-logic/import/proto/.*
 
 [libs]
 src/types/libdef

.prettierignore

@@ -1,3 +1,4 @@
+src/profile-logic/import/proto
 src/types/libdef/npm
 docs-user
 src/test/fixtures/upgrades

package.json

@@ -28,6 +28,7 @@
     "flow-stop": "flow stop",
     "flow-coverage": "flow-coverage-report -i 'src/**/*.js' -t html -t text",
     "flow-generate-libdefs": "flow-typed install --libdefDir src/types/libdef",
+    "protoc": "npx -p protobufjs-cli pbjs -t static-module -w commonjs -o ./src/profile-logic/import/proto/simpleperf_report.js ./src/profile-logic/import/proto/simpleperf_report.proto",
     "license-check": "devtools-license-check",
     "preinstall": "node bin/pre-install.js",
     "publish": "rimraf public_html && cp -r dist public_html",
@@ -78,12 +79,14 @@
     "gecko-profiler-demangle": "^0.3.3",
     "idb": "^8.0.0",
     "jszip": "^3.10.1",
+    "long": "^5.2.3",
     "memoize-immutable": "^3.0.0",
     "memoize-one": "^6.0.0",
     "minimist": "^1.2.8",
     "mixedtuplemap": "^1.0.0",
     "namedtuplemap": "^1.0.0",
     "photon-colors": "^3.3.2",
+    "protobufjs": "^7.4.0",
     "query-string": "^9.1.1",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",

src/profile-logic/data-structures.js

@@ -46,6 +46,20 @@ export function getEmptyStackTable(): StackTable {
   };
 }
 
+export function getEmptySamplesTable(): SamplesTable {
+  return {
+    // Important!
+    // If modifying this structure, please update all callers of this function to ensure
+    // that they are pushing on correctly to the data structure. These pushes may not
+    // be caught by the type system.
+    weightType: 'samples',
+    weight: null,
+    stack: [],
+    time: [],
+    length: 0,
+  };
+}
+
 /**
  * Returns an empty samples table with eventDelay field instead of responsiveness.
  * eventDelay is a new field and it replaced responsiveness. We should still

src/profile-logic/import/proto/README.md

@@ -0,0 +1,9 @@
+# proto files for importers  - /src/profile-logic/import/proto
+
+This directory contains the protocol buffer definition (`.proto`) files required for various importers, along with the corresponding compiled `.js` files.
+
+When adding or changing the `.proto` files in this directory, you should compile the updated `.proto` files using the following command and commit both updated `.proto` and the compiled `.js` files.
+
+```bash
+yarn protoc
+```